Oh I wish mothers would never hurt their children intentionally but sadly this happens.
Whether she does it intentionally or is under some spell herself, OP describes a problem here and while it’s never wrong to think about physical or mundane reasons first, OP seems pretty sure about what happened.
Using a prayer like a mantra can be a very powerful thing to do. Why do you assume they do it without feeling?
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Magickal tools only help yourself channel your magick, which comes from within yourself. Anything will do, what matters is your intent and persistence.
If you don’t have anything at all, you can still do magick.