Can’t remember the name

Hey guys so I read this book a while back and now I can’t remember the name or author. It basically involved a guy who’s obsessed with a girl and secretly stalks her even though he has been advised not to by his psychiatrist who’s a red haired woman who’s secretly a dominatrix who wants the guy to submit to her. The guy saves the girl he’s obsessed with from a mugging and then they go for a Coffee. They start visiting each other regularly. Meanwhile the dominatrix convinces the guy to submit to her as it will help him forget that girl. The end is that the dom had a previous boyfriend locked up in her dungeon. She tries to blackmail the guy by kidnapping the guy but the guy rescues his girl and the psychiatrist dies.

If anyone knows the name of this Novel please let me know

Source: reddit.com/r/eroticliterature/comments/nm7z3w/cant_remember_the_name