So there's this girl I know who has been with her boyfriend for almost three years. They've lived together for a couple years, have furbabies together, and talk about a future together. They have a good relationship. There are ups and downs, of course, but at the end of the day, they share common interests and have a strong physical and emotional connection. They love each other.
And then, the other night her boyfriend went to a bachelor party and had too much to drink and apparently let a girl sit on his lap and kissed her (or "she kissed him") not once, not twice, but three times. When he came home that night, she naturally asked him how the evening was. He said it was a blast, describing where they had gone but not really what they had done. He awkwardly mentioned some girls and some flirting. Minutes went by and then she asked him, on a gut instinct, if he kissed any of these girls. He said yes.
That night while still drunk, her boyfriend said the girls were kissing "all the guys" and it "wasn't a big deal" ... but it was a very big deal for her. She felt betrayed by her boyfriend, who she had never imagined was even capable of such transgressions. (I have even heard her say, many times, "He would never cheat on me" and she believed it wholeheartedly.)
And to make matters worse she also felt horribly embarassed, because "all the guys" at this bachelor party were her friends too, and they had witnessed her boyfriend drunk and kissing on/being kissed by some girl that wasn't her.
And then it came out that it wasn't really "all the guys"... it was pretty much just him, and maybe one or two other (single) guys.
When morning came, her boyfriend felt absolutely awful and apologized profusely for his horrible lapse in judgement. He said he was a "real dick" and felt terrible for hurting her. He realized being drunk was no excuse, and couldn't really say why he had let that happen, but only that he wished it hadn't. He promised it would never happen again and was willing to do "whatever it takes" to make it right.
But now, the girlfriend doesn't know if it ever can be right.
One the one hand, she has made similar mistakes in the past - maybe not quite so egregious, but mistakes nevertheless that her boyfriend forgave. He has never done anything like this before... and it was just a kiss. Or three.
On the other hand, she feels hurt, devastated, betrayed, and sick to her stomach every time she thinks about it. How will she ever be able to trust him again?
If you were this girl, what would you do? (If you need any more details to render an opinion, I'm sure I can ask her...)