Looking for a book where the POV character is tremendously devoted to another character, to the point of being willing to commit immoral acts or destroy themself. They could be servant/master, family, romantic, even a stalker, but the person they're devoted to is their highest and preferably only loyalty. It has to be an unhealthy level of devotion, and it doesn't have to be reciprocal at any point. NSFW is fine. Any genre is ok though thrillers and horror are preferred. Thank you
by dog_toy_bear