well you're married bro.
i think i would work that out before i went jumping into someone elses wifes pussy.
I gotta agree with the first reply.you better back off this dude's wife and work on your own marriage.
You've got to make her think he's cheating to get a chance. Have a woman call her and say she slept with him. Even have her describe the woman that you want. Make the woman calling say she dropped him off at work, and she was sitting in the parking lot then picked him up, it was pre-planned, and he didn't go to work, instead they went to a hotel for the day then she dropped him back off before his work day was over. When she says "What day?" make the girl say "I gotta run my husband just got home." then hang up. Then start hitting on her, invite them over etc.