You've completely conditioned Nina to be the perfect gag slut - only satisfied when she has your fat cock down her throat, filling her til she's gagging and drooling all over herself. When you return home with your balls full and ready to be drained, she's desperately stuffing her mouth and throat with her fingers but as she quickly tells you, it's not enough. She puts on a little show for you, letting thick sloppy spit out over her tits, which are already covered in humiliating body writing for you, til you're ready to use her. Even with your cock in her pussy, she can't stop stuffing her throat, shoving dildos and fingers down so that you can feel her pussy convulse around your cock while you watch her beg in between intense full body gags.