Every dollar of her own that she doesn't have to spend on necessities is a dollar more for her to spend on drugs and alcohol for herself and the fathers of her children.
I am glad you know that as a fact!
She could have stood outside the Dollar Store and asked strangers for change for the buck to feed her kids.
She could have maybe tried to steal something less frikking conspicuous than a 12"x5" carton of eggs.
Obviously not the brightest bulb in the pack. But I am sure her dealer gets paid.