BDSM story man meets mistress dominates her they fall in love...
You might be looking for the works of PocketRocket.
https://storiesonline.net/a/PocketRocket
Thanks but that is not it. He is set up with a girl and she gets home late. Her mistress is pissed and he steps in. The mistress wants him to move in.
The story is from "creepyj". He has removed it to sell it online. as far as I remember I found it at amazon one day...
bdgv
A while back there was a problem with people stealing stories, claiming them as their own, and trying to sell them on Amazon. Has that problem been resolved?