Emma wants more

With the professor out of commission for the moment, you turn to the other two girls. They've both been watching you fuck the professor with such raw intensity and seem to be in awe of her.

"I'm ready to get it in my ass again. I can take it this time." Emma says with a look of both jealousy and determination on her face, the girl certainly wasn't a quitter.

You lie down and have her get on top again, this time with her grabbing your cock and popping it into her own ass. Leaning back in a reverse cowgirl position and resting her hands on your chest, she starts bouncing on your cock. Her ass is plenty lubed from Ava licking it and her hole is still sufficiently stretched from your brutal **** of it earlier.

As she does this, the professor gets up along with Ava and the two of them kneel either side of her, licking her tits to help her enjoy the experience even more.

Based on the sounds coming from Emma you'd guess that she's already started learning to enjoy taking it up the ass, an impressive feat. You can't help but feel some pride in your work, you were really starting to build up a reputation for yourself in the bitch training business now, turning your third girl into a three hole slut this year.