If she has not responded and deleted you then her mother's situation is no longer your concern. You are not a couple. You are not guilty of anything because you have no alliance to her. Your responsibility is to yourself. If she wanted your support she would ask for it directly. So as far as blame she has herself to blame. She has ended it so if she has no support that is her choice. You need to move on and not concern yourself with her situation. When someone ends a relationship they don't expect that their ex will concern himself with their problems. As cold as it sounds you have to focus on what is going on in your life and let her do the same.
Please press accept