Maybe she believes that being D should not cause her to lose "all" of her extended family and friends. That perhaps, her life should continue to be blessed in every way possible. She may have read a book on CoParenting or spoken to a therapist who guided her to do these things.
Another possibility is that the tumor in her brain is making all rational behavior quite impossible. It is often difficult to distinguish the difference between the two possibilities.
What matters, is how you and your family are handling these events. If she is making anyone uncomfortable, they should read a book or talk to a therapist about setting boundaries. So should you.
Dealing with pesky tumors is always confusing to those tossed aside at the onset.
