He goes downstairs to grab some food out of the fridge when to his surprise he witnesses his father having sex with his mother. Not knowing what to do or say, the father gives his son a wink and watches as he walks back to his room in horror.
The next morning the father decides to talk to his son to let him know what was happening in the kitchen. When he opens his sons door he is shocked to see his son having sex with his grandmother. The son gives his father a wink and says “Not so funny when it’s your mom is it?”