During my teenage years my cousins and I were very competitive. Making bets that I invariably lost. Losing anything from money to fun (visit to do their chores rather than play sports etc).

I am fairly good at football (soccer) but my cousin was (is) an exceptional goalkeeper. For months with my all girls team I practiced penalty taking. Turning up at my cousins confident I bet them to a penalty competition. My cousin hadn't conceded a penalty across the whole season and for about 18 months in all games. Playing to his ego I suggested he would represent both cousins and I'd represent myself.

I bet them the loser would be the winners slave for a week, he countered with a month, so I countered with no rules, anything the winner wanted no matter what. We shook hands on it and we set up for penalties.

Shortening the story, I won. They protested but not wishing to lose face to a girl they both accepted a month of humiliation.

Their first task was based on revenge for a recent skirt flipping earlier in the month. I told them to strip to their boxers. As they stood there one in bright orange fitted boxers the other in tight fitted black boxers I could see them bulging with excitement. I lost all inhibition and used this to my advantage. They wore each other's boxers as crowns and played with each other's bulging cocks.

I had a month of fun getting my own back for years of torment and even now as adults there is an occasional knowing look between us