I lost a bet, and now I need you to stick your face in my ass. That’s it. Just stick it in, pull it out, and we’re done. I bend over and pull down my shorts, and you put your face in my butt. But then… you don’t take it out. You stay there and continue enjoying yourself, and before I know it, having you breathing so close to my asshole has turned me on too. We shouldn’t be doing this, but if you promise not to tell, I’ll encourage you to jerk off until you cum to your sister’s ass.