Dating your ex girlfriends sister
And every time someone says something, it reminds you of that fact.
Because think about it--if you were totally OK with your boyfriend's past, the teasing probably wouldn't bother you that much.
yeah, I'd be for saying 'no' too, since even if Ann does stop being petty about it, there's still going to be some kind of passive tension there. HOWEVER, if you're really really interested in Amber, you could just let her decide - after all, she'd know best about what her sister is really like.
Cheating is cheating and if that is not acceptable to you, you should find someone who will respect…
I actually know a guy that married a girl whom had slept with his brother first, they've been married a few years now and have kids.
I'd stay away from it or you're going to have a lot of shit to deal with in the future. if there was ever a situation to get a threesome with sisters... All I can say is, "Love is Love." no matter who it is.
They are obviously related so you will of course find stuff you liked from your ex but with this one you might get the full package the sister was missing that you want.