You're completely ignorant of how much money taxpayers have spent on your mom and sister. Public education and daycare for four kids costs taxpayers over $40,000/year. If your mom earned under $50,000, instead of paying income taxes, she got welfare from the IRS. Taxpayers provided your healthcare (medicaid). Etc. And, your mom probably did get food stamps.
That is, unless she earned upwards of $100,000/year, and I don't believe that of a single mom of four, with your sister continuing the family's parasitic tradition. You brought them up.