This could have happened to Slick Willy...?
I THINK YOU'RE THE FATHER OF ONE OF MY KIDS...
A guy goes to the supermarket and notices an attractive woman
waving at him.
She says 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 has ever been unfaithful
to his wife and says, "My God, are you the stripper from my bachelor party
that I made love to on the pool table with all my buddies watching
while your partner whipped my butt with wet celery???" She looks into
his eyes and says calmly, "No, I'm your son's teacher."