A little boy woke up on Christmas day and was excited about all the presents he had received. He asked his dad if he could walk over to grandma's house and get his present from her. His dad said it was okay.
When he got to grandma's house, he asked where his present was. Grandma replied, "For your present this year, I'm gonna let you fuck me, but you can't tell anyone, not even your dad." The boy agreed and proceeded to fuck his grandma.
When he returned home, his dad asked him what grandma had given him. The boy said, "I can't tell you." Dad said, "Tell me or your going to be punished." The boy said okay and told his dad what grandma had given him.
Dad looked at the boy and said, "What, you fucked my mother."
The boy looked at dad and said, "So what, you fuck my mother every night."
