Hello again,
I am trying to recall another story I read before I started marking stories I liked.
I don't remember much but in the story the Aunt uses bdsm to control both her sister and her sisters daughter. She is trying to teach them discipline.
The MC is brought it to work with the daughter I think it started as a dating relationship.
I remember a scene that took place in a hot tub with the MC and the daughter where the mc shows her what love can be, and I believe he was also coached by the aunt at some point.
TIA