A little boy wakes up in the middle of the night and walks into his parents room and sees them having sex. The little boy, traumatized, runs out of the room crying.  

"You should go check on him, thats really going to be something you need to explain," said the mother.  

The father laughed it off with a traditional "he will get over it," and continued to chuckle about the whole situation. After some additional prodding from the mother the father agrees to go talk to the little boy.

 As he is walking down the hallway to his sons room he hears an empty thumping sound coming from his sons room. Thump - Thump - squish - Thump- Thump.
 
The father, very confused, slams the door open and sees his son balls deep, pounding the shit out of his grandmothers asshole while she sleep. Just really going to town on it.  

The father screams "What the hell are you doing?"

 The boy replies, "It's not so funny when its your mom, is it?"

-- Modified on 5/13/2015 6:09:59 PM