Two couples are playing cards at the table, and one of the guys accidentally drops one of his cards onto the floor. As he goes under the table to pick it up, he notices that he can see up his friend's wife's dress, and that she isn't wearing any underwear.
Coming up from the table (and blushing a little), he puts his card down and they continue to play. A little while later, he goes to get a drink from the fridge, and the other wife approaches him. She asks quietly, "When you were looking for the cards, did you find anything to your liking?"
Awkwardly, he replies, "Actually yes, I did."
"Well, if you'd like some more, show up tomorrow at 1 pm and bring $500. You can like it a little more then.”
He kindly agrees and, sure enough, the next day he shows up at 1 pm with $500. He hands her the money and they proceed to have at each other, in every conceivable way, for several hours.
After the deed is done, he leaves the house.
About ten minutes later, her husband calls.
"Hey, did Mike come by today at around 1?"
Ashamed and a little frightened, she says, "Uh, yes he did."
"Did he happen to give you $500?", he replies promptly.
Her heart sinks, "Y-y-yes, he did."
"Ah, okay. Good. He came by earlier and asked to borrow $500. He said he'd drop it off at the house today at 1 pm."