When our son was about 12/13, as a joke, we put him on the naughty list on that portable North Pole app where Santa does a personalised video. We did the adult video and made Santa say it's because he was caught weeing in the shower.
We honestly thought he'd find it funny because he obviously didn't believe in a Santa anymore, but no...he was SO upset and stormed out of the house crying. I felt SO bad!!!! I still do!!
What have been your parenting fails!!