"Church Special" joke

Called away for an emergency, a priest didn't want to leave the confessional unattended, so he called his rabbi friend and asked him to cover for him. The rabbi told him he wouldn't know what to say, but the priest told him to come over and he would stay with him for a little while and show him what to do. The rabbi came over and he and the priest entered the confessional.
A few minutes later, a woman entered and said, "Father, forgive me for I have sinned. I have committed adultery."
"How many times?" the priest asked.
"Three times, Father," replied the woman.
"Say two Hail Mary's, put $5 in the box and go and sin no more," instructed the priest.
A few minutes later, a man entered the confessional and said, "Forgive me, Father, for I have sinned."
"What did you do?" asked the priest.
"I committed adultery," the man confessed.
"How many times?" the priest asked.
"Three times, Father," answered the man.
"Say two Hail Mary's, put $5 in the box and go and sin no more," said the priest.
The rabbi then told the priest that he understood what he was to do, so the priest left.
Shortly thereafter, another woman entered the confessional and said, "Father, forgive me for I have sinned."
"What did you do?" the rabbi asked.
"I committed adultery," replied the woman.
"How many times?" asked the rabbi.
"Once," the woman said.
"Go and do it two more times. We have a special this week, three for $5," said the rabbi.