I swear, we have the same sister.

You did the right thing to cut her off, cut off your father, and not expose your children to them. BUT your mom is a grown woman, who is not retarded, and while she may not be showing the best judgement, she is trying to be helpful to her child. Whether you like how this girl behaves or not and whether you have cut her off or not, your mom still hasnt cut her off (even if for the sake of seeing her grandbabies) so, she is doing what she believes she needs to do to get those grandbabies safe again. I bet if it was just your sis, your mom would have refused her. Your mom doesnt sound like she will be talked back into the nest.

Its darn poor judgement on your sis' part, but in her mind nothing ever happened, you made this up, there fore there is NO eartly reason why her mom cant help her move.

Took me years to understand that my mom keeps contact with my drug addicted, pill popping sister because she feels needed, useful and that she isnt abandoning a child that everyone else has run away from. It used to really hurt that my mom would hand her things to hock so she could pay for her pills, or that my mom would get extra pills claiming extra pain to give to her, so she wouldnt seek them on the street.

Trust your mom. Wait for it to be over, and reconnect so that your mom has someone safe that she can vent to.

Then come let me know if I need to take a road trip with my glock.