... does it become rape, even if it was consensual to begin with?
What if you switch to her butt?

it's not rape, since she let you begin. At least that's how I see it.
but if you're so bad a lay that the girl your fucking falls asleep on you, well...you don't deserve to be fucking now do you.

edit: but if the girl is drunk, that's a different story, if she passes out instead of falling asleep, That crosses an invisible boundary.

why the hell would she fall asleep unless she was totally fuckin wasted? But if she was really drunk and you were sleepin with her anyway then yes. At least it should be.

Wouldnt you just slap her awake again?
That way you can ensure she cant claim you raped her and she was asleep the next day.

I have told the story of how I lost my virginity here many times...but once more for t3h Lolz:

Me: "Was it good for you, like was I any good, Princess?"

Her: "Zzzzzz zzzz "


*male confidence shatters and hies me away to a monastry*

Anyways

To answer the question , yes it could be classed as rape. The law (most places) requires her to be able to give her full and continued consent.

Although even in these fem-nazi days I don't see the DA being able to bring a prosecution.

Jacko...Look at it this way...You did her so hard and so good, all her energy was spent and she just couldn't keep up with your virile, manly ways! ;)
That's how I'd look at it!

And as far as I know, yes it could be classed as rape...But you didn't continue...How's she gonna know? She's asleep!