No, that's a different thing, and it is asking a lot. I can't tell you want to do there, but I think if it were me, I'd really evaluate how I feel about her. Do I really love her, and I'm reasonably happy with her? Am I happy enough to stay, knowing I might not ever figure it out? If I'm not, then I can either ask about the open relationship, or I can call it off. But neither of those will probably be easy.
Is there a specific guy you're attracted to? Or is it just... a possibility?