I can't really get enough of those two (sorry, Isaac) to the point of wanting to write some things related to all this, sadly, my writing skills suck pretty much.
Do not worry, if I ever write anything worth sharing I'll show you.
Also, I perfectly know that women did wear layers under the corset but for the sake of sexiness, Amèlia doesn't. Or we can pretend that Ermengol makes her wear it without anything under, honestly, he would.