Doesn’t sound like that great of a home life. Been there and can sense your aggravation, abandonment, and loneliness. Don’t know about that sleeping in another room deal, but from my experience, my worst nightmare came true when my STBE told me she was having a “relationship” with another man. I have two sons. One is in college in AZ, and the other is a Jr. in HS and my wife rescues animals as a hobby.
Bottom line. Up until very recently she had been having and affair with the animal control officer in our town THE DOG CATCHER! We will be officially divorced May 6th (next week).

I’d look into what that other bedroom is all about. Just prepare yourself for the possibility of something you might not want to know. I NEVER would have believed she could do that. Was I wrong! BTW, go with your instincts and start thinking in terms of protecting yourself.

Good luck brother