That doesn't sound right to me. I am a mom, I don't think a parent should be getting money from their child like that, unless it was like some emergency or unexpected type situation. But in that case should be paid back. Mom should be able to care for her own financial needs unless she is disabled in some way.
Yes if u keep helpin her ur inableing the situation shes just useing u wen she calls stop answering the phone stop sending her money wen she ask make her see that u will not support her usein u for money