you both are frenemies

you two were playing chess, you both were betting on some.. adultery.. The one who wins gets to take charge in the activity. In to his surprise, you won. He was shocked but.. A deal is a deal

They both started the activity, you were not being gentle with him at all.. He gasped and starts clinging onto you

"M-my dear f-friend.. Calm down!"

he said nervously, he was completely at your mercy

(You could be a girl or a boy, this could be for both)