Explain to me: If you are a single 25 yo female with three child

Villas - Explain to me: If you are a single 25 yo female with three children, 1 year to five years old, not working and on public assistance, none of the childrens fathers in their lives, none provide child support, barely able to provide the basics to sustain life, let alone a nuturing home, and now maybe you are preganat again. It just doesn't make sense. Have you not figured out how this happens?