@gum_rummy : It is probably a meta thing. Which is to say the woman was made with a body like that because she was intended by the writer to be raped... and she was personalised as a cosmic bitch to try and make it seem justified. I imagine everything else was built up around that.
Personally though, I wouldn't want to rape her, let alone the rest of what he does. The only lust I have most of the time is bloodlust. I'd probably just chop her to pieces and leave all her severed bodyparts scattered all over the castle.... or crucify her on the battlements or something. Even if I did have any sexual inclinations, I'd probably vent them on the headless maid corpses... but honestly I don't have much libido anyway.
THAT SAID... his healing powers offer some interesting opportunities...
Like maybe her body could be melded together with the two headless maid corpses to turn her into some sort of composite freak-monster... Remove the arms, meld the torsos together, her head at the top... remove the hair... turn the severed arms into some sort of neck-extension and make her into a freakish 6-legged lumbering monstrosity, distort her mouth so she can't speak... and leave her own guards to kill her.
Frankly.... the protagonist's idea of "revenge" is far too milquetoast.