Giving it to Emma

You spend some time going slow like this, letting Emma learn to relax and accomodate such girthy meat in her tightest hole. The professor is a tremendous help, continuing to lick Emma's pussy the whole time she takes it up the ass. Ava jumps in behind the professor and starts eating her ass and rubbing her pussy from the back.

It takes some time, but eventually you're able to bury the entire length of your cock in Emma's ass. Based on her facial expressions, you wouldn't quite say she's enjoying it but she's being a real trooper and not complaining one bit. You decide it's time to take it up a notch.

"You ready to ride it?" You ask Emma, pausing and removing your cock from her ass to let her answer.

"Ok..." She says hesitantly, getting up off her back on the table.

You take a seat and Emma walks on over to sit on your lap. With her facing towards you and her tits pressed into your face, you reach back behind her and slip your cock into her ass.

"Oh fuck that's deep!" She shouts out as you slide the whole thing into her ass.

Like a proper whore, Emma slowly starts bouncing on your cock. Thanks to all the professor's saliva providing plenty of lube, it slides in and out of her hole pretty smoothly. However, it isn't long before you start hearing her getting out of breath from the combination of having to work whilst on top and having the wind knocked out of her by the gargantuan cock churning her insides. You decide to take matters into your own hands and grab each of her plump ass cheeks. With a firm hold on her rear, you use it as leverage to start pistoning up and down into her hard and fast.

"Oh fuck! Oh fuck! Oh my Goh-ooo-ooood!" She squeals out, perhaps praying for it to stop.

She doesn't last long taking it so rough in the ass like this before she's begging for you to stop.

"Please! Enough! I... can't take... anymore!" She begs, reaching with one hand behind her to try and remove your cock from her ass.

You do as she pleads and stop, removing your cock from her ass and tossing her to the side.

"Oh my God! It burns." She says, referring to her well fucked asshole.

"Ava, kiss her hole better. Let me show you girls how a real slut takes it in the ass." Says the professor, stepping forward to take Emma's place.