While the fox man kisses and laps at you appreciatively as you slowly come down from the high, his cum inside you takes over reshaping your mind. Your feminized system responds to his cum inside you and ovulates, producing several eggs and positioning them for easy access by his seed.
Soon his bestial sperm reach them, and one after the other they are surrounded and slowly capitulate to him, giving you a litter that takes root inside you. And you feel every one of them as they implant into your womb, making you pregnant. His seed is yours and your eggs are his.
He whispers sultrily into your ear, "You're such a good bitch," exhausted but relieved. Slowly you realize you don't need the lust to make you want to be his bitch anymore. _He_ has vanished, and now it's only _she_.
"Th-thank you, master," you reply after catching your breath. It felt so good to have him turn you into his bitch, and his appreciation of your transformed body makes you want to stay this way.