It was simple: I don't cum on her tits and no chores for a fortnight, if I do then vice versa.

We're fucking hard missionary position, she's rubbing her 30DDs while seductively licking her lips saying that she'll let me give her a facial too and needs to taste my hot cum.

Feeling her orgasm on my cock I can't resist the teasing, putting her on her knees I jerk off onto her big tits and make her look up at me as I finish all over her pretty face.

She smiles innocently then says two words - "I win!"