Funny dating joke

Son: "Daddy??, I fell in love?? & want to date?? this awesome girl??!"
Father: "That's great son. Who is she?"??
Son??: "It's Sandra??, 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.??
Sandra 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 Angela??, the other neighbor's daughter."??
Father: "Ohhhh I wish you hadn't said that.
Angela 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's 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."?!!!
Son  Fainted..??.!!!