Christine gets prepared for you.

"I'll think that I'll take 'Mom' first," you say, "So lube her up a bit for me, ****."

Sharon looks up at you angrily, but you stand your ground. She relents and covers the distance between herself and Christine, once you move out of the way.

She goes to work quickly, licking the outside of her best friend's pussy. She shows signs of experience.

"How is she doing," you ask Christine, rubbing her hair softly.
"She's good."
"Is she as good as last time?"
"...no, she's not. I'm sorry, Sharon," Christine says.
"Tell her what to do better," you order.
"Lick the inside of my pussy. You know that I love that."

Sharon muffles a reply that sounds like something along the lines of 'I can't.'

"Tory, get over here," you command, "Spread this lovely MILF's pussy lips open so that her friend can lick her right."
"Yes, Master."

The co-ed saunters across the room and gets down on her knees next to Sharon.
With her hands bound in front of her, she is able to easily manipulate Christine's pussy lips. Sharon uses this to improve her technique on her friend.

"Thank Tory now."
"Thank you, Tory," Christine says, half-moaning now.
"Is Sharon as good a cunt-licker as she is a cock-sucker?"
"Yes, even better!"
"Are you going to cum soon," you ask.
"Y-Yes, Master."

You suddenly grab Sharon's head and pull it away from Christine's pussy! Tory plays along, moving her hands off of Christine's pussy and scooting back a bit.

"It's time to fuck you now," you say, "Remember one thing: the more I do with you here, the less I do with your daughter.

If you stand there and do nothing, I'll have plenty of energy left to fuck her little cunt. Got it?"
"Yes, Master," Christine says obediently.
"Good, what position should I choose to screw you in?"