She has to earn it the hard way.

"If you want the treatment, Ms. Chalke, you need to do something dirty."

She gives you a look.

"Yes, besides what you already did. I want you to...eat out Jennifer's ass. If you can make her cum, your chances of getting the treatment go up dramatically," you explain.

"I guess you know what your final task to earn *your* treatment is, don't you, Ms. Aniston."

She nods nervously. She's all in...but not happy about this new wrinkle.

Jennifer gets on her knees on the couch, facing away from both of you.
You put a pillow down for Sarah to get on her knees behind her (hopefully still) friend.

Reluctantly, she starts to use her tongue on Jennifer's dirty hole.
Being a top tier Actress, she's waxed clean all around it and washed thoroughly, so it's not that bad.
You watch the pair, stroking your cock.

As the minutes tick by, Jennifer starts to react more and Sarah seems to get into it.
It helps that Sarah is fondling her ass and playing with her pussy a bit too.
You aren't mad- she's being creative and getting the job done.

You move in to see it up close, to nobody's objections.

Sarah is using long, lingering strokes to hit both the pussy and asshole.
Good form.

You stand up and get next to Jennifer on the couch, reaching over to fondle her tits.

"Are you going to cum? Do you want to cum for your friend?

Oh, are you afraid that I'll deny your treatment again if you do.
Well, let me make this easier then- if you refuse to cum for her, you definitely won't get an ass like Gwyneth's."
She nods.