I THINK YOU'RE THE FATHER OF ONE OF MY KIDS

A guy goes to the supermarket and notices a beautiful blonde woman waving
at him and say hello. He's rather taken aback, because he can't place
where he knows her from.
So he says, "Do you Know me?" To which she replies, "I think you're the
father of one of my kids."

Now his mind travels back to the only time he as ever been unfaithful to his wife
and says, "My Gosh, are you the stripper from my bachelor party that I laid
on the pool table with all my buddies watching, while your partner whipped
my butt with wet celery stalk?"

She looks into his eye and calmly says, "No, I'm your son's math teacher."