Some time in the pussy and then in the ass!

You keep fucking the pair- one with your hand and one with your dick- for several minutes.

Asa cums twice, aided by Tia and herself both rubbing her pussy.
Tia can't quite cum, but is pushed close to orgasm several times.

"I can't cum without that dick," the Teacher says, "Please fuck me with it and not her."
"I'd be upset, but she is my Mistress."
"True. However, I decide who gets what. So if you want my cock, you need to raise the stakes..."
"Fine. Please fuck my ass. I need to cum!"

You smile and nod, giving the Teacher a spank to let her know you agree.

Getting up behind her, you stand on the couch and push your cock into Ms. West's asshole. It is still loose from earlier and she's so horny that she makes it easy to enter her this way.

Asa gets excited and goes in behind her too, pushing her face into Tia's wet pussy and licking her.

Tia cums within a minute, but doesn't stop.

After a few minutes, you need a change of position. No need to wear yourself out just yet.

"Time to ride me again, bitch. I know just how you two will like it."

You move onto the couch and sit down. Tia goes to mount you, but you correct her slightly- you want her facing away from you.
Asa smiles as she knows why you did that.

Tia's ass is filled up and you start to get fucked by her as Asa resumes licking...

Tia cums again- hard!

You enjoy this position too, playing with the Teacher's tits and nuzzling her neck when she leans in close.

While you're distracted, you feel a new sensation.

"Ooh, you found something else to lick and play with, I see," you say with a smile.
"Your balls, right? She loves them- I don't know why."

It isn't long before Tia cums again.

"I wonder what your limit is," you say, leaning in close, "I think we're going to find out today..."