Since the wife is eight months into her pregnancy, the husband has to sleep on the floor to avoid any regrettable mistake, which might happen pretty easily, for he has been desperate for sex for quite a while now.
Just before lying down on the bed, she glances at him and sees the poor guy curled up on the floor, eyes stare widely into the empty air, filled with hopeless desire. Feeling sorry for her husband, she opens the top drawer of the cabinet, takes out a fifty dollar bill, and gives it to him. She says, "Honey you're so depressed. Here, take this and go to the woman next door, and she will let you sleep with her tonight. But remember that this happens only once. OK? Don't think about it or ask me to do this again."
The husband rolls his eyes in disbelief, but afraid that she may change her mind, he grabs the money and leaves quickly.
A few minutes later, he returns, hands the bill back to the wife and says with much disappointment, "She said this is not enough, she wants sixty dollars." The wife's face slowly turns red with anger.
"Damn that bitch! When she was pregnant, I only charged her husband fifty!"