Her moms feelings, and opinion, are not important, and she is biased. Avoid the confusion by leaving her, and her family alone.
All that matters is how you cope with this situation, so do other things besides worry about her, and her feelings, as her actions are pretty clear, aren't they? Ignore her texts, and be busy, and unavailable to her.
Don't let her confuse you, and pull you back, and forth.