Mental health, suicide, and self-centered behavior: focus on the japanese family and the elderly

My mother-in-law is very selfish because she has been living alone for a long time. She is so used to living alone that she thinks nothing of doing things like vacuuming at midnight. My mother-in-law only talks about herself and doesn't seem very interested in her son or what other people say or are doing. This makes it difficult to interact and communicate with her. I do not want to take care of my mother-in-law should she become ill and this is something I think about, since my husband is the eldest son.