Original text from chapter 204:
Allen:どうしたクラウン・クラウン!!?
Apo:イノセンスでワタシを傷つけることはできない
クラウン・クラウンも望んでいるのだよ
アレンの為に
ワタシとの合体をね!!
My attempt at a translation:
Allen: What's wrong, Crown Clown?!!
Apo: I can't be harmed by Innocence.
Crown Clown wants this too, for your sake.
To be united with ME!!
^^^ It is not specified who/what is to be united/aligned with Apo. Personally, I think Apo's trying to merge with Crown Clown. I'm not great with slang but even if Apo was talking about Allen and not CC, I'd highly doubt the line has anything to do with rape. (And note that in context, the line Allen says two pages later about puking directly follows him reminding Apo that he's Cross Marian's pupil, while making a very Cross-like face, awww. Of course he'd be disgusted by the idea of working with the guy who killed his mentor.)
Anyway, Happy Holidays everyone.