i desperately need advice!!!!!!
my bachelorette party was this past sat. night...a few close friends went into nyc for dinner, drinks, etc.....
included in this group of close friends was fi's brother's girlfriend. they've been together for 4 1/2 years, and live together....fi's family HATES her...she's growing on me, but she lack social graces that normal people have (saying please and thank you), and doesn't really know how to talk to people.
however, she communicated well with some guy at a bar on saturday night - so well that she was tongue wrestling with him in the bar. she admitted to me that it wasn't the first guy she kissed since she's been w/ fi's bro, and also admitted that she's still annoyed at fi's bro b/c he got a lapdance at fi's bachelor party....we literally had to TEAR her away from him to get her to leave.
i grabbed her, and took her to the b-room when i saw what she was doing. i asked her if she knew what she was doing and if she wanted us to 'save' her. she said no, she liked this guy, she knew she shouldn't but he was so cute she couldn't resist.
i told fi when i got home; he didn't care...he thought it was effed up, but said we shouldn't tell his bro b/c it wasn't our business. i feel like it's my business - they are talking marriage and i was there, watching....this isn't a friend of a friend, or something like that - it's family now. my best friend said i should tell the girlfriend that she really needs to fess up. fi says if i really feel a moral obligation to say something, i should wait until after mexico (so about 4 weeks)...i also thought about having my best friend or my sister slip in mexico, b/c they have no attachment to any of these people.
so what would you do? i'm so confused!
(sorry so long, and tia for any advice!!!!)