He probably didn't rape her because... ONE Sparda was also topless. They were probably just together, with their guards completely down and hell, TWO Eva had weapons (a badass scythe and glaive).
What's up with these forums bringing up rape into the story. That's just a horrible train of thought. SERIOUSLY. *slaps all of you*
Ooooooh, that's what you meant by the rape thing. I had no idea >.< My mention of it in the other thread was a total joke, though. I wouldn't think there was any rape or whatever :x