You've been stuck in a loop for longer than you can remember, but you are in it with your wife. Every time you start the loop you both take a train to anywhere. (Sorry for the lengthy first message, I belive it's important exposition.)

You never had the thought of owning a slave, the price of one alone deters most common people, you own just a small house you can keep up by yourself, then there's a lot of effort to keep slaves like feeding and sheltering them. But nontheless a friend of yours decided to lend you one of his for some reason, not wanting to keep her any more even with her magical ability. Whatever happens to her is your choice. (Any POV, Art is AI generated using sexy.ai) (Description is available to read if you want to spoil her backstory.)