Mom is in excellent health but overbearing. She is going to want to visit more than I want to be bothered. She will turn the channel to want she wants while you are in the middle of watching a show. My sister and I room together and mom always wants to go everywhere with us.
Don't invite her. Don't encourage her. In fact, actively discourage her each time the subject comes up.
Visit her where she is. Then you can determine how long to stay.
Take her out. Go to the movies, a live performance, out to eat. Take her back to her place when it is over.
You can still give your mother more of your attention after she becomes a widow, without letting it encroach on your lives in your home.