She's happy to take Shay down a peg.

"I like it," she replies, "I have an idea that you might like too."

After some discussion, you and her face-time with Eva, making sure that Shay is not around.

Since she knew you would see her, the MILF dressed up nice and sexy...

You explain the plan to her.
She smiles.

She agrees to it, but only after adding some things that will make it more effective...

You and Shay wait in the Hall as all of the set-up goes down...

Eva and Shay are in the Room and they are 'auditioning' for a Bondage Website.
The latter is going first- naturally.

Wearing a cloth bikini, Shay is tied down to a couch and has a vibrator pressed into her pussy by an unseen (by the camera) Eva...

She's acting up 'a bit' for the camera, but Eva knows what setting she can easily take a vibrator at.
If she 'accidentally' goes too high, well...accidents happen.

For the next part, Shay 'needs' to show some skin, so Eva uncovers her tits as the bondage vibrations continue...

Eva continues to push Shay to her limit while she discreetly texts for you to enter.
You both do so.

Shay is too distracted to notice your entry, but you sure notice her.

As if on cue, she cums hard and her eyes open wide with the orgasmic release.

It is right then that she sees you two.