I think the best way i've heard so far is for your gf to mention a 3some in a way that can be deemed as a joke, then that way you can brush it under the carpet if you have to. if you run out of time then it wasn't meant to be i say, just tell her to enjoy the night and flirt away, you can then ask him if he's inviting you two back to his place for a drink and take it from there... good luck :thumbup: