Obey

You obey immediately. This is not a drill; this is a punishment after all, and it's best to cooperate with whatever she wants from you. You lie on the floor with your knees apart and your arms stretched out before you as the class stares down at your exposed ballsack and cock sticking up.

Coach Preda positions herself on your face and spreads her cheeks. With one swift motion, she squats right down onto your face, pressing her asshole down onto your tongue. You suck for air greedily and feel the soft cheeks press themselves further and further into your face until there's nothing left but her smooth panties against your mouth.

She moans loudly, obviously enjoying the sensation of having your face pressed right against her hole. She rubs her ass cheek back and forth across your lips, grinding herself against your tongue and forcing more and more of her flesh into your mouth. Her pussy grinds against the top of your nose too, making it impossible not to breathe through it. The smell of her sweaty asshole mingles with her natural pheromones, and your cock starts twitching uncontrollably as she continues grinding away, her ass squishing into your face.

Oh God, the smell is overwhelming. You try to resist it as much as possible, but it's difficult. Your mouth is filled with her scent and your eyes water as it assaults your senses. Her asscheeks are huge and firm and rub up against your lips and tongue in perfect harmony with the movements of her hips and the thrusts of her pussy. Your mind begins to drift as you feel her hot sphincter slide up and down over your tongue repeatedly, sliding past your teeth and smothering you in its musk.

After what seems like forever, she lifts herself off you, leaving you coughing and sobbing. "We'll be doing 3 sets of this, ten seconds each."

That was only ten seconds?!? You can hardly catch your breath from those brief ten seconds and now you're supposed to do it again?!?