agree with dave and jesse.. even if nothing comes of it now, down the road sometime she's gonna explode on you because she's been harboring some kind of jealous/mistrusting/whatever feelings from the threesome (if it happens)... or maybe you're right and you all have a great time, but is it worth the risk o_O?
still with the same girl for about a year now. it's getting harder because she's in NYC for school now, but i gotta say i'm really liking this one. might be a keeper.