Shrinking Collar from Mean Girlfriend

You come into Jane's place and see a collar laying on the table! You're excited- and she asks you to put it on. She blindfolds you, locking the collar tight around your neck, closing the lock with a click... This is no ordinary collar though. She runs through the settings, controlling your arousal flow and pleasure with a touch of the key. There's a fun setting here- SHRINK! Suddenly you're half your height and panicking, but Jane reassures you that if you cum, you'll DEFINITELY grow back to your regular height... she teases you, and every time you get hornier you shrink further. She tears open her fishnets, and as soon as you see her bare ass you're swimming in your clothes on the floor. Jane shrinks you until you're barely the height of the balls on her huge dildo and makes you watch and stroke for her as she pleasures herself. She rides the huge cock until you cum everywhere and... you're still small? Hahaha- try again! Jerk through the pain- cum again for your God Jane. You have no choice- she could exert her will on you in a second. You do as she commands and cum again... only to be the smallest thing ever, the collar coming off and your new permanent size sinking in...