I imagine this feels much more complicated living in the middle of it than it seems from the outside.
Regardless, it's not unknown for a person who has lost or is losing his/her romantic grip on a person to try to retain that grip with need/guilt/woundedness.
What is comes down to, as has been suggested, is: Where Are Her Loyalties?
And, this: "Yeah but has he sought help for himself? Of course not. He's got your W."
What stuck said. Ultimately, she is doing OM no favors either.
"Show me a completely smooth operation and I'll show you someone who's covering mistakes. Real boats rock." -- Frank Herbert