personal mechanic
Well, times are tough so my wife's new car has been traded for a used car. Old cars need additional maintenance and there is a guy down the street who is a mechanic. The wife tells him we don't have extra money right now to make repairs so if something needs fixing, can she work out a deal with him.
Being the rowdy, blue collar guy he is, he figures out right away what she's talking about. He inspects the car and comes up with a list of things that needs fixing. She asks if its ok to go over to his place this weekend to work out a deal with him.
Being a married lady, he knows he can take this a lot further than other girls so when she shows up, he has a buddy there to video tape the whole thing.
Not having any money, she feels she has to do what he wants. Once he's through fucking her, she has to take care of the cameraman while he tapes it. He makes three copies, one for her to bring home, one for him to keep, and one for the cameraman.
Once your wife is used like that and then comes back again to negotiate other repairs, he knows she will do whatever he wants. She has gotten to know a lot of his friends.