My sister and I live in my mother's home and we both have children. My sister has been a good mother in the past but lately due to unforseen circumstances she no longer is around to take care of her children. She still lives in the house and neglects her children. I take them to school every morning and my sister picks them up after school, but immediately takes her children to my mother at her work place. My mother and I basically taking care of them day after day. We believe by way of admittal from her, that she has gotten herself involved in drugs and selling them. (Which made us feel very uncomfortable and unsafe in our own home). She's been stealing money from my mother, myself and has committed Identify theft. My mother and I are very concerned, because the children are showing signs of resentment towards us (because they think that we are at fault that their mother isn't around) What can my mother and I do to remove her from the household and retain guardianship over her children?
P.S. I do not want to get her in trouble, we don't want her kids to be involved in another down point in their lives. But we also don't want my family especially my children to be involved in the things that she has brought upon herself and all of our lives.

