Neither of you can wait a second longer for this, and he pushes inside in an instant. You yowl in pleasure as his body asserts the femininity of yours, spreading your pussy lips and filling you with his manhood. Soon he's inside you down to the balls, and their touch against your crotch reminds you how you've just gotten emasculated.
He kisses your muzzle and you return his motions eagerly, knowing that it's only a matter of time before he truly mates you by filling you with his seed and fertilizing you. Slowly and tantalizingly, he pulls himself away, most of his sheath withdrawing from you, before thrusting back inside. You half-moan, half-yelp at the roughness of it. He pulls back and does it again, and this time it's all moan. The speed he's starting to pick up is so tantalizing, harsh, and above all, animal.
He rests his head close to your neck as he pounds in and out of you so you can hear his pants and yips of pleasure, barely able to hear your own. He soon breathes into your ear, "Good girl." The words sound so strange, but accurate in a way they never have in your life, and you love it. Everything he does to reinforce his manhood and your newfound womanhood turns you on so much, and he seems to know it, judging from how his paws move to your breasts and carefully cup them.
As he thrusts faster and more erratically, his peak approaching, you realize you're getting closer to your own as his sheath rubs deep inside you, brushing firmly along your G-spot. "I'm gonna pump you full of my seed," he groans.
"Are you gonna mate me?" you whimper, egging him on.
"You're gonna be bearing my brood," he confirms. "I'm so glad you became female, it suits you... mmh... perfectly..." You find his groan so hot- he thinks you're hot as a woman and he's gonna breed you! You moan in satisfaction, and cum hard around him.
He can't hold himself back once you do that, and you feel his balls twitch against you and his cock pump his warm seed inside you. Once his orgasm subsides, you kiss him softly and cuddle up together, his shaft still inside you.
As he promised, his seed are setting about impregnating you. Your feminized body has already made several eggs, and his sperm soon find and wear away at them. Soon they are all claimed and led into your womb to make you pregnant.