There is a novel I am looking for. This is what it says about a married couple. The husband suffers from a mental illness and discovers that his husband is watching him from the door and does not go to work. He thinks that his husband has become possessed.
it is 100% "impersonated husband" if this is what you are looking for Synopsis: I am home alone, planning my escape. My new husband has gone to work. But I know he actually hasn’t. He is outside the door, looking through the peephole at me. He has been standing there all day long. At 5:25 in the afternoon, he will open the door and pretend to have just gotten off a long day at work, saying: “A-Zhen, I worked very hard today. I missed you so much.” I have to run away, because not only is “he” pretending to be my husband, but “he”…..isn’t a human being! Now, I have three plans…..