Originally Posted by Fidelia
Ultimately, the responsibility for the state of their relationship rests with them, but you can encourage and support open communication and loving behavior.
This, and that's all.
It isn't really for you to say what she does in her other relationship. If it seems she is being hasty, then that may be something to watch out for if she starts another relationship and you are the one that she may drop. She may very well of been thinking about leaving before you came along. Perhaps also she finds poly too much work and would far more enjoy being just with you... who knows.. sounds like some more communication is in order.