Son : "Daddy, I fell in love & want to date this awesome girl!"

Father : "That's great son. Who is she?"

Son: "It's Tina, the neighbor's daughter".

Father : "Ohhh I wish you hadn't said that.I have to tell u something son, but you
must promise not to tell your mother.Tina is actually your sister."

The boy is naturally bummed out, but a couple of months later

Son : "Daddy, I fell in love again and she is even hotter!"

Father : "That's great son. Who is she?"

Son: "It's Peny, the other neighbor's daughter."

Father : "Ohhhh I wish you hadn't said that. Peny is also your sister."

This went on couple of times and the son was so mad,he went straight to his mother
crying.

Son : "Mum I am so mad at dad ! I fell in love with six girls but I can't date any of them because daddy is their father!"

The mother hugs him affectionately and says:

"My love, you can date whoever you want. Don't listen to him. He is not your
Father."!!!