You've had Supergirl under your power for a while, but she's been getting a little too demanding and mouthy, and she needs to be taught a lesson. Coming in and seeing that she's slipped her duct tape gag and is trying to get out of her wrist bindings, you let her know you're going to use a vibrator to make her cum. She struggles and curses at you behind her gag, but soon her tits are out and her bodysuit pulled to the side with a vibrator wedged against her clit. She struggles, her eyes getting wild when she realizes that she is going to made to orgasm. As she tugs against her bound hands and tries to talk through her gag, she cums. Shaking, moaning, she begs you through the gag to turn the vibrator off. But you don't and she's made to cum a second time, shaking and squirting as her eyes roll back in ecstasy. She's dripping squirt, and promises she'll be a good girl through the gag before falling back, exhausted and spent after cumming so hard two times.