The scene with Cersei & Jaime is controversial. In the books it is a consensual, if energetic act and was meant to be in the programme but unfortunately it was poorly shot. It was a huge mistake.
It's out of character for Jaime - rape is something he doesn't like as he had to listen to the Mad King basically repeatedly raping his wife - it's the reason he intervenes, at the cost of his hand, to stop Brienne being raped.
The GoT Wiki has the following about it:
"...the implication that Jaime was raping Cersei was never intended by the writers, not in the script, and was the accidental result of flawed camerawork and editing. Both the actors and director have publicly stated that they were never told this was intended as a rape scene nor did they play it as such".
It's definitely one thing I would not hold in the memory as it really is badly flawed.
