Edelgard’s Torment [FE3H Rhea Mass Twinning, TG TF]

[This begins during the final chapter of the Crimson Flower route - spoilers abound. This features situational horror and mind fuckery. You've been warned.]

"Is it finally over?" Edelgard panted as the Immaculate One toppled over in defeat.

"Never…" The great dragon breathed. "This world… will never, NEVER be rid… urk!- of me…" At that, Rhea's body ceased to function, falling silent once and for all.

Byleth suddenly collapsed, much to the Adrestian Emperor's horror. 'No! No you can't! Not now! Not at the very end! I want you to witness the fruit of our labour! I want to share our future together…' Edelgard thought as she dropped to her knees, holding tight to that whom she loved. She pressed an ear to her dear professor's chest and heard… nothing. No heartbeat. Tears welled up, quickly overflowing and running down her face. Edelgard hugged Byleth oh so tight.

Inside Byleth's heart, Sothis' crest stone began to fade away and impart life to her silent heart. Byleth regained her heartbeat for the first time since infancy.

Edelgard's own heart skipped a beat as she felt life return to her beloved. "Byleth!"

"El… Did we… do it?"

"Yes! We prevailed! My teacher, we did it!" Edelgard hugged even tighter.

However, Byleth's hair and eyes did not revert to their natural colours, instead remaining green. Nobody thought anything of it, as it had become the professor's new normal.

"Nnng… my head…" Byleth groaned, getting to her feet.

"Come, let's get you some medical attention."

—

After the war, Edelgard, Byleth, Dorothea, Bernadetta, Ingrid, and Marianne settled into their polycule as a loving family. Those Who Slither in the Dark were subdued, at least for the time being. Hubert had arranged that the simultaneous assassinations of Thales (posed at the time as Lord Arundel) and many other known Agarthans would occur during their final battle in Fhirdiad, most of which succeeded. The continent was finally at peace again - if only temporarily - leaving the Empire to regroup its forces and, more importantly, give everyone some much needed free time.

Almost everything was perfect; Byleth had begun to suffer from chronic migraines, but life was otherwise happy. At least, that is, until Byleth once again collapsed unexpectedly just over a month following the final battle.

—

Edelgard sat alone at Byleth’s bedside, gently stroking her soft green hair while resting her head on Byleth’s chest. Each slow breath her sleeping wife breathed, and each peaceful beat of her heart, assured her that, for that moment, all was well. That Byleth was alive, living to see one more moment. Then the next moment, and the next.

The Emperor knew how strong her mentor, friend, and lover was. She had seen her perform superhuman feats and withstand vicious attacks. Yet here, watching her rest, Edelgard felt that her beloved wife was so delicate. She felt the strongest urge to protect her, to keep her safe from everything this fucked up world threw their way. A part of her assumed the worst would happen when she least expected it. That her family would survive the horrors of war only to fall to the mundane risks of life. That was why each breath, each heartbeat, each little thing mattered to her.

Slowly opening her eyes, Byleth clasped Edelgard’s hand in her own. “Hold me, El.” She was beyond happy to oblige.

Her comfortable, silky bed leggings and loose, soft undershirt were perfect for a bit of cuddling. Edelgard slid her legs under the covers, wrapping them around Byleth's. The strong lady embraced her lover, squeezing tight as if it were possible for her to slip away from her forever. Byleth was so warm, so soft, so lovely to touch.

Edelgard could feel several scars over the professor's relaxed, naked body. They gave a chill down her spine every time she remembered they were there. Memories of all the times her beloved friend was wounded and in pain, of all the times she cheated death and tanked amounts of damage that would obliterate most others.

But holding her made the Emperor feel at ease. Nothing would harm Byleth ever again, not while she was there to protect her. Edelgard squeezed even tighter. "I've got you, dear. You're safe… so safe… I'll protect you. I love you."

"I love you too, El. Nnng… ow… my head…" Byleth muttered weakly.

"Shhh, just rest. I'm here, it's alright. Just try to relax," Edelgard said, gently rubbing Byleth's shoulder.

But Byleth grew restless, squirming as if trying to find a comfy position. And then Edelgard felt something odd: her arm was resting on Byleth's breasts, which were seemingly expanding.

"What!?" Edelgard sat up, watching her lover change before her eyes: her breasts continued to inflate; her hair grew longer; her body stretched out taller; and her face slowly began to reshape itself.

"Nnng… Edel… Ed… er. Trai… tor…" Byleth's voice warbled as she held her head in pain. Byleth's mind warped and rewrote itself into that of another. New memories flooded her mind as the physical changes finally finished.

A familiar face was staring back at a stunned Edelgard.

"N-no! This is impossible! How-!? But-!!" The horrified lover fell out of bed, landing on her back. "We killed you!"

"Traitor." Seiros slid out of bed, looming over the prone Emperor. Her naked body seemingly sprouted attire from thin air: a white dress with golden accents fell over her mature body; a white and crimson cape gracefully wrapped around her shoulders; a shield engraved with the crest of Seiros appeared on her left arm; a divine sword sheathed in a golden scabbard secured itself to her waist; and finally, a crown featuring beastly wings topped her head.

"Wha-!?"

"My darling traitorous wife… don't you have anything better to say to me?" The archbishop said with a playful yet sinister tone.

"You're not my wife, you monster!" Edelgard quivered.

"Oh but I am your wife, darling~" Seiros continued. "You took everything from me, and now I will take everything from you, starting with your traitorous wives."

"You'll never kill them! I will protect them!" Edelgard scrambled to her feet.

"Kill your wives? Dear, I am your wives. Or at least, I will be." Seiros sneered.

"I-impossible!"

"I am the Immaculate One. This world is mine to rewrite as I see fit."

Edelgard finally broke free of her shock, retreating out her bedroom door screaming for help. "Doro! Bernie! Ingie! Mari! Help!"

Bursting into their study, Edelgard found Bernadetta and Marianne each reading a book while sitting close together on a couch.

"Eep!" Bernie shrieked, dropping her book.

"Oh my!" Marianne added as both ladies stood up at alert.

"Bernie! Mari! It's Byleth! Something's happened to her!" Edelgard breathed.

"I am fine, El~" Seiros teased seductively from the doorway behind her. She knew calling her 'El' would strike a nerve - she still retained Byleth's memories, after all.

"Don't you DARE call me that!" Edelgard snapped.

"E-Edie? What's wrong?" Benadetta squeaked. Both she and Marianne had genuine confusion written all over their faces.

"It's her! It's Seiros! She's possessing Byleth! She transformed her body right in front of me!"

"Um… What are you talking about, Edie?" Marianne asked quietly.

"Professor, what's gotten into Edelgard?" Bernie asked the woman in the doorway.

"Oh, our poor El is having a panic attack!" The former Archbishop said, gracefully walking towards Bernie and Mari. "She must be seeing things…"

"Wh-what!? You can't seriously believe that! She looks just like Seiros! She sounds just like Seiros!" Edelgard yelled.

"Edie… Byleth's right, there's nothing out of the ordinary. You should get some rest." Marianne cooed worriedly. “She’s looked like this ever since that incident in the woods back in our academy days, and she’s always sounded like this.

"It's ok, El…" Bernie said softly. "Seiros is gone now. She'll never hurt us ever again. She'll… never… t-traitor?" Bernie rubbed her hair as a sudden spike of pain shot through her mind.

"Nnng… what's…" Marianne groaned as she too grabbed her head in pain.

Both women's hair and eyes faded out of their natural violet and blue hues, recolouring themselves to a light, minty green to match those of Seiros.

"My mind feels… odd…" Marianne said, her voice shifting as she began to sound more like Rhea.

"Oh goddess, it's spreading!?" Edelgard whispered in terror.

Thoughts of revenge and conquest boiled in the minds of the changing women, being corrupted from the inside-out into copies of Rhea in mind and body. Their consciousnesses were forcibly transformed and linked to each other, forming a Seiros hive mind.

"I told you, El…" Bernadetta began in Rhea's voice.

"...that I am your wives." Marianne finished, also in Rhea's voice.

"N-no… no, no! Give them back!" Edelgard cried.

"'Give them back,' she says, unaware of the irony in her words," Seiros stated viciously. "You stole everything from me, Edelgard. I am merely returning the favour."

Just as with Byleth five years prior, Bernadetta and Marianne's hair and eyes had changed colour. For the moment, those were the only visual changes made. However, Edelgard could sense there was nothing remaining of the women she loved in those husks before her, save for stolen and assimilated memories.

"Oh El, we love you so much~" The Rhea-Bernadetta and Rhea-Marianne simultaneously spoke in a mocking tone. Extending their arms for a hug, they moved toward the petrified woman with creepy, identical smiles.

Try as she might, Edelgard couldn't move a muscle. She wanted to flee, maybe get Hubert to determine what kind of forbidden magic this was, but her body refused. All she could do was feel the insincere hugs her corrupted wives gave her.

They were nothing like the genuine, loving embraces she was used to. These ones were stiff and rehearsed, the kind of hug the archbishop would give to those who sought her blessing.

"I know you're into this, traitor," Rhea-Bernadetta whispered into her ear.

"Wh-wh-what?" The Emperor stuttered.

"I can feel your hard-on, you pervert," Rhea-Marianne added. “You loathe that you’re attracted to your sworn enemy, don’t you?” At that, Rhea-Marianne dominantly kissed Edelgard as she pressed her body against her prey’s.

Rhea-Bernadetta shifted behind her, completing the Edelgard sandwich as she slid her hands under Rhea-Marianne’s body and over the bulge in Edelgard’s leggings. “You’ve imagined me naked many times. You’ve imagined the perfect, divine body of the Archbishop pressed against your own. You despise me, yet you crave me…” Rhea-Bernadetta hissed into her ear.

Edelgard wanted to punch Seiros in her perfect, evil face. She wanted to shove her tormentors away, but she couldn’t bring herself to harm her possessed lovers. She had the strength to overpower them, yet she remained still. Edelgard knew it wasn’t them, but the mental block was still there.

“Look at me, you damned apostate. Watch as your wicked lovers are purified and reshaped in my image.” Rhea-Marianne and Rhea-Bernadetta shoved Edelgard against a bookshelf, then stood so both women were in her sight. “Nnng, mmm…” The pair moaned as pleasure spread throughout their bodies. Their forms shifted and warped as, bit by bit, they became more like Rhea: Their hair lengthened into long, soft locks; their tiddies grew from cute bumps to massive mommy milkers; their hips and asses expanded to enviable proportions; their heights increased to the same tall stature as Rhea’s; their clothes stretched to snugly fit their new bodies, turning white, gold, and navy as they became the archbishop’s attire; and elaborate headdresses appeared above their shapeshifted faces. Two completed Archbishop Rhea copies and the original Seiros stood before the Adrestian Emperor, who shook her head in disbelief.

“Mmm, much better…” one of the newly formed Rheas hummed. “That Varley girl had a cock. Hmmph, all the better I did away with it. You should be thanking me, traitor, your wife has a pussy now~”

“You monster! What bigoted nonsense are you implying!? I love my wives no matter what’s between their legs! This is exactly the dogmatic bullshit I fought so hard to destroy! Our lives are for us to live, not for you to mould as you see fit!” Edelgard grabbed a random book from the shelf behind her and shot it at Seiros, then sprinted out the door.

—

“Finally! Dorothea, Ingrid, I found you!” Edelgard rushed up to her wives, who were preparing opera props backstage with Manuela.

“Oh, hey Edie! What’s the matter?” Dorothea asked.

Remembering the way Bernadetta and Marianne reacted to seeing the Seiros-possessed Byleth, she knew that the Rheas’ magic must have altered the memories others had about those she possessed - but she needed to know for sure. “First, do you trust me?”

“Of course we trust you, Edie, but what’s this about?” Dorothea replied.

“Are you alright hon?” Ingrid added.

“I need you to describe Byleth’s appearance to me,” the frantic woman stated flatly. “Please, just do it.”

“Umm, well, she has green hair… green eyes…” Ingrid began.

“Shit,” Edelgard cussed under her breath, realising she should have asked about Bernie or Mari, someone who didn’t already bear a resemblance to Seiros. “What about Bernie? What does she look like?”

“Tall, green hair, huge pillowy boobs…” Dorothea began, proving her hypothesis.

“Oh gods…” Edelgard facepalmed. “Alright, look. Byleth, Bernie, and Mari have been possessed, and I assure you I am NOT joking.”

“What!?” Ingrid exclaimed. “How!?”

“I don’t know, but I do know it’s Seiros who possessed them. She spoke to me through them. She… mocked me. She mocked Bernie, from her own mouth!” Edelgard clasped her mouth and fell to her knees, tears suddenly swelling in her violet eyes.

“Oh goddess, Edie it’s alright…” Dorothea knelt before her, wrapping her arms around her in a loving embrace.

“Don’t cry, El. Your wives are here for you~” Rhea cooed from behind her.

Edelgard swiftly spun as she got to her feet, facing the Rhea twin who followed her. She shielded Dorothea behind her. "Stay back! Don't hurt anyone else!"

"Why would I do that to my darling wives?" Rhea asked, her voice dripping with sarcasm that only Edelgard could pick up on.

"Nnng, ow…" Manuela gripped her head and shut her eyes tight. Ingrid also winced and sighed in mild pain. The two ladies' hair burst into Rhea's bright green hair, as did their eyes.

"Ingrid! Manuela! Gods, she's possessed them too!"

"Oh Edie, you have quite the imagination now that the war's over," Ingrid said in Rhea's voice.

"What? Edie, how could she have possessed them so quickly? Are you sure?" Dorothea asked fearfully, holding tight to Edelgard's hand.

"I'm certain, just keep your distance."

"Oh dear, you wound me…" Rhea-Ingrid pouted, taking Dorothea's hand in her own. "You trust me, don't you darling?"

"Of course I trust you, Ingie, you know that! There's got to be some way to prove you're you..." Dorothea sighed.

"Good girl! Now give your wife a kiss, hmm?" Rhea-Ingrid said seductively as she leaned in for a kiss.

"Doro, no!" Edelgard pulled her lover away from the corrupted Ingrid and stepped between them.

Rhea-ingrid and Rhea-Manuela then began their transformations into full Rhea copies, this time occurring much quicker than before. Their bodies and clothes reformed themselves to create perfect Rhea duplicates.

"Dorothea we need to go!" Edelgand once again grabbed Dorothea's hand and rushed her away.

The two women ran through corridors and stairwells, eventually finding themselves in one of the guest bedrooms.

"I think we're alone in here," Edelgard said as she scanned the room.

"All alone… and you know what that means, right, traitor?"

Edelgard practically leapt away in surprise, turning to see Dorothea with matching green hair and eyes. "No! Dorothea, not you too!"

"This one has quite a stunning body… I might just keep it like this for a while," Rhea-Dorothea mused, looking down upon herself.

“Let. Her. G-go.” Edelgard said slowly. “Let them all go.”

“Or else what? You’ll point your boner at me?” Rhea-Dorothea scoffed, strutting up to the quivering woman to place a hand on her cheek. “I will break you. I will become everyone in this forsaken land, save for you. You will have nowhere to turn to, no one to share company with - except for me. You will worship me as the goddess that I am, begging me to make love to you forever. Then, and only then, will I return this world to how it was. I will leave you broken and obsessed, in love with me - and only me.” Her eyes narrowed menacingly. “Then you will feel this loss all over again as you cry my name for the rest of your days, dejected and abandoned.”

“Wh-what sort of horrific-!?” Edelgard was cut off as Rhea-Dorothea pressed her lips against the Emperor’s.

The possessed Dorothea wrapped an arm around Edelgard, pulling her closer as her other hand slid from Edelgard’s cheek through her silky white hair to the back of her head.

“You hate me so much, traitor… You hate me but you find me irresistable…” Rhea-Dorothea breathed after ending their kiss, then dropped her voice to a whisper as she began to lift her tight skirt. “Turn your hatred into pleasure. Make love to me, Edelgard. Treat me like one of your treacherous wives. Dominate my delicate body, lovingly caress my soft curves in a passionate dance of emotion!” The possessed woman sat on the nearest bed as she lifted her skirt above her crotch, revealing Dorothea’s violet embroidered panties made specially for her by Bernadetta.

As Rhea-Dorothea slid a finger under her panties’ waistband to pull them down, Edelgard’s head was suddenly hit with a short burst of pain. A subtle idea was planted in her mind: ‘Perhaps banging Rhea would feel good - for purely cathartic reasons, of course. It’s not like I actually love this monster or anything…’

Edelgard pushed the Rheatised woman on her back, sliding onto the soft bed with her and positioning herself above the coy amalgamation of enemy and lover. The tormented domme unhooked Rhea-Dorothea’s dress and bra for her to tear off, exposing the wonderful round pillows she had gotten so accustomed to fondling.

“I feel so safe under such a big, strong woman, El~” Rhea’s mocking voice rang through the room. “There’s no chance a creature as big and dumb as you could betray little old me…”

“Shut up, bitch!” Edelgard snapped.

“Make me, you unfaithful cow!” Rhea-Dorothea snapped back.

Edelgard forcefully began making out with her not-quite-wife, rolling her tongue over in her partner’s mouth while feeling her luscious, balm-adorned lips grace her own. Kneading her tits harder than she ever had before, Edelgard felt the familiar orbs warm her war-scarred hands.

The enthralled Dorothea meanwhile pulled her domme’s tight leggings down, followed soon by the plain black panties underneath. The fabric slid over Edelgard’s bulge, releasing her girlcock to grow ever larger as it pulsed in building excitement. Rhea-Dorothea then squeezed her Emperor’s firm ass with both hands, pulling her torso closer so her dick was pressed between their two bodies. Hot precum leaked onto Dorothea’s soft stomach as Edelgard slowly began to hump her lover.

Something about the thought of the Adrestian Emperor fucking the Archbishop of the Church of Seiros - no, fucking Seiros herself - felt wonderfully scandalous. Eyes closed, focusing on the sensation of touch, Edelgard allowed herself to drop all pretence and simply enjoy herself.

At that moment, Rhea slid her torso up, directing Edelgard’s throbbing member towards her dripping wet vulva. Edelgard accepted the archbishop’s request, sliding into the beloved pussy she had pleasured so many times before. It somehow felt different this time, however, and not just because her wife was under the influence of her sworn enemy. It didn’t matter at that time, though. What mattered was how fantastic it felt sliding in and out of the woman under her, feeling each wet kiss her cock received from her partner’s labia lips. What mattered was the huge, soft, squishy tiddies at her command. What mattered was the dance in her mouth as she furiously french kissed Rhea’s smug face.

Finally, the pleasure began to overflow. “I’m gonna-!” Edelgard moaned before releasing wave after wave of warm cum deep inside Rhea. The final moments of exhilarating climax faded away, leaving the Emperor slumped on the Archbishop. Opening her eyes at last, relaxed ecstasy instantly transformed to panic. “AAAAAAGH!” Edelgard leaped off the bed after seeing a completely transformed Rhea copy in bed with her.

Rhea too got to her feet, what little clothing remaining on her body warping into her complete Archbishop attire in but a moment. “What a refreshing change of pace, wouldn’t you say El?”

“Wh-what have you done to me!? How could you-!? Why did I-!?”

“I told you, you find me irresistable,” Rhea’s voice sounded from behind Edelgard, who spun to see another Rhea copy who had arrived undetected.

“I’m losing my mind! I… I-!” Edelgard felt another momentary jolt surge through her brain as another thought presented itself: ‘That was the best sex I’ve ever had… I need more! More of… Rhea? N-no! I can get satisfaction without that vile woman! …right?’

Edelgard ran out again, forgetting that she was almost naked, save for her undershirt. All her lovers had been corrupted by that vile, divine, lovely… lovely? …by Seiros! She needed Hubert, someone, anyone! Before long, she spotted Felix and Sylvain, their backs turned to her. And their hair colours weren’t green! Seiros’ influence hadn’t reached them yet!

“Felix! Sylvain! I need help, there’s an emergency!” Edelgard shouted, slowing down to a stop behind them. They turned around to face the bottomless Emperor, and- “Oh gods!”

Despite their hair and eye colours remaining their natural hues, Rhea’s face stared back at Edelgard. “When will you learn that I am your life now?” Rhea-Felix spoke in, surprisingly, Felix’s voice.

“Haven’t you caught on yet? I’m not a slowly-spreading infection. I am life, I am all. There is no hope for you, traitor,” Rhea-Sylvain used Sylvain’s stolen voice, then switched to her own. “Now submit to my mercy and beg for me.”

Both guys’ bodies warped with inhuman fluidity, quickly turning into two more fully converted Rheas.

“Worship me, Edelgard. Admit defeat. Accept that I am all you have, all you will ever want,” Seiros, the original one who was once Byleth, commanded as she approached from behind.

“N-no! Never! Let my family go!” Edelgard screamed, surrounded by the villainous hivemind’s many bodies. “LET THEM GOOOOO!”

—

- One Year Later -

“Oh Lady Rhea! I love you, my darling!” Edelgard, mentally deteriorated after a year of infinite Rhea (and a year of compounding mental changes imposed by Seiros’ magic), said lovingly.

“Call me a good girl again, just one more time, traitor~” A naked Rhea copy cooed from underneath the Adrestian Emperor.

“Mmm, my good girl~” Edelgard chimed before pressing her face against Rhea’s wet pussy.

“Nnng, oh Edie! I love you!” Dorothea’s voice cried out in pleasure.

Edelgard pulled her face away in shock to see Dorothea, just as she had been before Rheageddon, lying in bed with her. “Wh-what!? What happened to Rhea!? Where did you go!?”

Dorothea sat up in alarm. “R-Rhea? Edie, she’s been gone for a month now.”

“A month!?” Edelgard exclaimed. “Rhea! Rhea where are you!?”

Emerging from the next room, Byleth appeared, sword in hand. “What’s going on!? El are you alright!?”

“Where’d she go!? I need her!” Edelgard ran out of the imperial bedroom, stark naked, looking for any sign of the person who became her entire life - but it was no use. Everyone had reverted to their original identities. “Rhea! RHEAAAA!”

—

A day had passed, but finally Edelgard had arrived by horseback to the once again abandoned Garreg Mach Monastery. The frantic woman burst into the former Archbishop’s quarters, tears running down her face. “Where are you…” She sobbed, falling onto the divine bed Rhea once slept in.

She spent most of the night repeating “Rhea” to herself over and over again, eventually crying herself to sleep. When she awoke, it was like something clicked inside her. Edelgard walked to Rhea’s chest of drawers and searched for clothes the Archbishop might have left behind. She was in luck.

“Rhea…” Edelgard weeped, picking up one of her white dresses and holding it to her face. Without thinking, she slid her naked body into the dress, followed by adorning herself in Rhea’s gloves, her embroidered cape, her slim footwear, and finally the Archbishop’s divine crown. Edelgard walked in a slower, more delicate manner than she would have normally towards the nearest mirror. “R-Rhea. Rhea. I am Rhea,” Edelgard said, attempting to mimic the real Rhea’s inflection, pitch, and other vocal traits. “I am the Archbishop of the Church of Seiros. I am the Immaculate One. I always have been.”

The End?