Sounds like a horrible pattern of alcohol dependency my man... Checkout the flick: http://www.imdb.com/title/tt2265398/?ref_=nm_flmg_act_17

Everytime they drink, buddy wants to bang her, this could be yer GF, always saying "no", then oopsie.....

My advice, creepy, but you need either do one of two things.

1) end it.

2) find proof she is or isn't doing this again.

For #2, a simple compromising of her mobile device and GPS data monitoring will render you the results you need to prove her innocence or enough to throw her under the bus.

If this was a one time thing, then great, you'll have that ace in your pocket to throw out there when you fight. But if you can see that she is clearly an alcoholic with substance and sexual tendencies than, you made need to look past your self esteem issues, dig deep and get the fuck out.

Truth be told, I married a woman at 25, had been with her since we were 17, figured I couldn't do any better and settled. (mild self esteem issues on my part) It was the worse thing I ever did....

As we grew older she just wasn't horny as she used to be, combine that with her entire family moving in(they were poor) it drove a wedge and I left. Thank goodness no kids....

Fast forward, I meet the woman of my dreams in 2008, she is a pornstar in bed, loves porn, loves my passion for it. Now we have two awesome kids, planned I might add.

My wife has always bi-curious and finally just this past summer, she finally tried out a girl with me. Nirvana! She's now bi-sexual and we have foursomes few times a month with this hot lesbian(but still bi-sexual) couple we met.

So all that to say, you never know what else could be waiting for you....