I have come up with an idea about a feline girl who lost her way and pumped into a human guy. Her kind is living in groups among human: imagine those China towns with mostly Chinese living there, some of them never get out of the community to interact with other people. And she's one of those, she hasn't been around human often and doesn't understand human society very well.
Anyway, her family (or even the whole town) is moving to a new place and she gets lost. Worse, it is her time of the month. No, not that bloody season, I mean the mating time and she really needs to get laid. She could be a virgin and this is her first experience so she doesn't know how to control the urge. I was thinking she would either look totally human and the only difference is that she acts like a cat, or she has those ears and tail but furry people are just another kind of people in the world, like Asian, European...and he wouldn't be surprised to see her. Or she could transform...it's up to your preference.
Now she's with a male and what have to happen would happen....\What comes next we could discuss.
There're many possibilities since for her, it'd be like a good girl after her first time drunk at the club and found herself naked in bed with a man. Confused, scared, surprised...something like that.She'd need to find her family, or they'd find her. She could run away from him and he might accidentally find her somewhere else later, or he would chase after her, or perhaps she doesn't run and he'd help her find her family...
She doesn't like to dominate men, but she could always ask other men to please her. If they get married and they leave the country, there would be a chance she join another man in bed and doesn't understand it's cheating(This is for jealousy scene or so...)...While she isn't a dom, other women in the story maybe: her mother, her friends...they could ask for a go with him (or simply take it) since he's not her husband, just a slave. This is up to your liking. But please keep in my those dom women aren't the main characters here and this isn't a story of an abused man. Again, if you're looking for someone with a leather belt to whip your character, look somewhere else.