This one is called:
Dark in Here!
A wife takes a lover home during the day while her husband is at work.
The 9-year old son comes home early, sees them and hides in the bedroom closet to watch.
Unexpectedly, the woman's husband also comes home.
She puts her lover in the closet, not realizing that the little boy is already in there.
The little boy says, "Dark in here."
The man says, "Yes, it is."
Boy: "I have a baseball."
Man: "That's nice"
Boy: "Want to buy it?"
Man: "No, thanks."
Boy: "My Dad's outside."
Man: "OK, how much?"
Weeks later, it happens that the boy and the lover find themselves in the closet again.
Boy: "Dark in here."
Man: "Yes, it is."
Boy: "I have a baseball glove."
The lover, remembering the last time, asks the
boy, "How much?"
A few days later, the Dad says to the boy, "Grab your glove, let's go outside and have a game of catch."
The boy says, "I can't, I sold my baseball and my glove." The Dad asks, "How much did you sell them for?"
The Dad says, "That's terrible to rip off your friends like that...that is way more than those two things cost I'm taking you to church, to confession."
In church, the Dad makes sure the boy goes in to the confessional and closes the door.
The boy says, "Dark in here."
The priest says, "Don't start that sh*t again; you're in my closet now."