My wife wants another cock, for a threesome.

My wife's ultimate sexual fantasy is DVP (Double Vaginal Penetration). Unfortunately, her boyfriend is straight, and NOT interested. The one and ONLY time I joined them for a 3Some (in 6 years they've been together), he was totally awkward, unable to perform, and totally ruined the mood for my wife and I.

I've tried encouraging my wife to let her boyfriend know that DVP is her ultimate fantasy and that she REALLY wants to experience it at least once... And that if he's not willing to be a part of it, that she will strongly consider finding another guy to help fulfill her fantasy. She HASN'T told him that, and probably won't.

I'm guessing the best way to fulfill my wife's fantasy will be to use the strap on dildo that she actually bought to peg me.