Looking for book title / author

Help!!! Its been a good year or 2 since I read this book. Can't find it in any of my digital reads / audios.

Shes a patient of some kind. Shes not able to live alone after some huge thing but is ritch. That i know of she doesnt talk from trauma.

He owns a security company with his brother. They get guardian ship of her and just make sure she doesnt try to kill herself . He googles her and finds out she used to go to upper class parties and He gives her therepy sessions. He watches her on the security cameras and ends up being intimate with her.

Its alot of his pov. He usually does the night watch while shes supposed to be sleeping but he still interacts with her at diffrent times . She sleeps better when hes on shift.

Sorry thats all I have . Its almost like I dreamed it.