PimpRoll has
Screw My Sexy Wife.
MassiveDollars has
Bone My Wife.
These guys are a CCBill program, so they don't pay via Epass or offer PPS, but they've proven to convert really well for me and they do have hosted movie galleries. So anyone else interested in the same thing, but willing to to get paid by CCBill would be happy with them.
FrankieBank has
Sharing My Wife and
Wife Craves Black which both involve the husband watching the wife getting screwed by another guy.