"Mistress, please take away my free will," you say.
"And why would I do that, Kitty?" Mistress asks.
"I want to be completely obedient to you like Horsey. Plus the old me keeps trying to come back, I don't want that."
Mistress considers as the warm water splashes down on the five of you. As you wait for Mistress's answer, your eyes drift to Horsey's penis and you become transfixed.
"Okay," Mistress says. "Your free will is hereby gone!"
She snaps her fingers and your thoughts cease. You're no longer transfixed by Horsey's penis. You merely stare into space in that general direction. You can still feel a vague glow of pleasure, but coherent thoughts are beyond you now.
"Let's see now," says Mistress. "Get horny."
You feel your vagina grow moist and your nipples get erect. You're so happy to be so obedient.
You all finish in the shower and Mistress takes you and Horsery to her room where you have more sex. Mistress masturbates to the sight of you two going at it. Once that's done, Mistress has you do her homework. Then she stops giving you orders and you collapse like a doll no longer being played with. You lay at Mistress's desk, dumbly drooling all over it as Mistress goes to bed. She leaves you sitting there all night, then has you masturbate for her in the morning. This is your life now. Not even a servant, but a toy. You're so happy.