Something sort of like that 'worked' for me once. In college, one of my best guy friends was in the process of figuring out he was gay, and dealing with all that comes with that. in the process, he told his semi-long-term girlfriend, who was actually sort of upset that maybe she'd 'caused' my friend to 'switch teams.' I also knew her pretty well, through my friend. And it ended up that as their relationship ended, I was in the perfect place at the perfect time, and she and I ended up having sex (at first secretly b/c we thought it would cause our mutual becoming-gay (boy)friend to become even more weirded out). In the end, though, we fessed up to each other, and it ended up fine. She and I even hung out a few times (double dated?) with my friend and one or another of the guys he started seeing once he was more or less officially out. Some of our little group conversations about sex/relationships ended up being pretty funny, interesting, and on some level, even sort of a turn on (for me). A little weird, maybe, but it was a good experience.