Interesting. She actually lay on the bar AFTER he had his hand on her butt. That's a bit different to her account. Also, she failed to mention the "chomping on her breast".
I like your quote, but isn't laughing a signal? And therefore an action? When you laugh after someone touches you (which apparently she did), you're communicating a thumbs up to the toucher. Which is NOT an invitation for more touching, I get that, but it's certainly within the rights of the toucher to believe that further touching has been pre-approved. Level of drunkness influences how someone will wait for a more certain invitation before going ahead and touching again. This happens sometimes in bars and clubs.
She did say she felt suicidal at one point, so that's enough to lay off and put this down to just how far a messy night can go! We'll never know if another catalyst could have triggered suicidal thoughts if the event had never happened, but if I had to bet, I think she was heading somewhere dark before that night.
Silly girl.