Basically, you have a good chance of being prosecuted unless you can prove she wasn't extremely drunk. I've heard several cases like this. I believe the law says that a woman can NOT give INFORMED CONSENT when too drunk. If you can prove she wasn't wasted and passed out after, you''re in luck. If she was completely trashed to the point where she couldn't walk home, that may be an issue. It all depends on the degree of the situation. You need to possess the ability to consent, to be able to consent. It doesn't matter if she jumped your bones or not, it's all about informed consent.