Jenni!

Starla and Sasha struggle to loosen their ropes and get up...

They have to be careful, not wanting to roll/fall into the pool.

The latter manages to get her legs loose and goes to help the former.
Both eventually get their legs and arms free.

They stand up- getting circulation back- and decide who to free.

Starla goes to Mallory and works on her arms.
Sasha goes to Madison, but suddenly...

"Wait- not yet. Let me enjoy this for a few more minutes."

She's surprised, but does what the redhead asked.
She looks at Jenni...and goes back to Mallory.

Starla has taken out her gag and is working on her legs, so Sasha removes the towel and goes about untying the lines from the other tree.

She walks over and looks at the woman's tied tits.
She gives them a squeeze, surprising the submissive!

"I had to take my chance. I see why guys like these."

The duo finally free her from the tree and remove the rope around her tits, lingering a few times longer than necessary.

They work together to free Madison, who is less thankful to be free than Mallory.

The quartet stand in front of Jenni.
"You're why we're all here," Sasha says.
"How could you," Starla asks.
Mallory is too embarrassed to speak, but Madison unties Jenni's arms.

They all go inside as Jenni slowly frees herself.

"I suppose I deserve this," your slave says, walking in a few moments later with the rope in hand.

You know what to do with Jenni as her final tie here.