The husband said to his wife that is was necessary for her to make some money through prostitution to get by.
So the husband drove her to the place where she had to do the job and in the evening he picked her up again.
"So, how much have you earned today?" the husband asked.
Well", the woman responded, "I've made one hundred dollars and fifty cents."
"That's strange", the husband responded, "who gave you the fifty cents?"
Said the woman: "All of them, of course!"