The Wealthy Aristocrat

A wealthy aristocrat was hosting a party at his estate, which had been in his family for generations. He noticed that one of his guests bore a striking resemblance to himself. He could not believe that such a similarity could exist with no genetic link, so guessing that his father had sown some wild oats, he approached the guest and asked with a smirk, "Was your mother ever a maid here?"

The guest replied, "No, but my father used to be the gardener."