Thanks, Kramer. You sound like a good man. I bet her older kids really appreciate having you in their lives.
She may be gone until OM is ready for a newer/younger version. When she has nowhere to turn, she may call you, IDK. In many cases they have to hit rock bottom before they recover their senses.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!