I wouldn't say that was rape Baw.
I would say in all likelihood she consented and had been throwing it about all night, its not a guys fault if he takes her up on an opportunity like that.
If she was so sure she had been raped, im sure she would have made more of a fuss about it, not just laughed it off.
Yes it is immoral to have sex with someone who is pished out their skull, but its not illegal.
Sounds like a filthy wee slapper tbh, you got her number? lol