You don't.

Licking and slurping at her delicious folds you feel a pair of strong hands on your hips. You know what she yelled, you know what this means and you are straight, right? So why aren't you doing anything to stop it. The back of your tiny skirt hikes up just an inch or so and you feel a calloused thumb poke into your hole. “Nice and wet.” You hear a low male voice say.

“I fucked him real good.” She says and slaps you with the strap on she used on you.

The thumb recedes and something thicker takes its place. It slides into your wet hole slowly but relentlessly till you feel hairy legs press against yours. “You should have shaved his legs or put on stockings.” The man behind you says as he draws back.”

“Oh my, I totally forgot.” She says then slaps you, “It isn't all my fault, a good slut would remember that.” He pumps into you as she slaps you again. Then suddenly she stands up as he thrusts into you again. In her place is now a fat 7” cock sticking out of a pair of undone jeans. “Suck it baby.” She says and you feel her hand tangled in your new long blonde hair. No sooner than when your mouth opens both sets of hands roughly force the meat into your throat. As they hold you like that struggling to get free the man behind you picks up the pace and is now hammering home into your asshole. “Oh, does sissy need to breathe?”

“Oh fuck.” The man behind says and fills your hole with cum.

Both hands let go and your head flips back a strand of spittle connecting between your lip and the head as you cough and spit. Another cock slides into your ass and she slaps you again, “No one told you to stop.” She says but she doesn't grab your head, instead she lightly places a hand on your back while the other reaches under and takes hold of your cock and starts pumping in time with the new cock in your ass. “Suck.” She says long and slow, almost like someone trying to sound like a snake.

“Yes mommy.” You don't know why you call her that, but it just sounds right. His hand returns to your head and helps you go deeper than you want each time you bob down his cock. A second load fills your ass. A third man starts fucking you. He is enormous but slow. Never thrusting fast, just long lazy strokes in and out. He also lasts till you have swallowed five loads of cum as each new guy takes a seat in front of you. Your own cock is also locked in a soft pink cage she put on after getting you to cum. When mr. huge finally blows into your now well fucked asshole you look to your girl and ask, “How many more mommy?”

She looks left and right and says, “Looks like ninety to me. Give or take a few two timers.”

“Ninety?” You say as a new more anxious cock begins pounding away at your ass.

“Of course dear, I always break new girls in with an even hundred and I am pretty sure you are ten in. Don't worry your pretty little head. Tomorrow I am going to take you to the doc to make you nice and pretty. You are a natural.”

One hundred loads of cum swimming around inside of you, a long time later, she gives you a great big kiss and asks, “Do you want to spend the night with me, or should I have Eddy drive you somewhere?”