That sister would never be allowed to be around very young or elderly people.  She never be someone i would never trust her she would be someone to sweep stuff under the rug no matter what they do

Something is DEFINITELY fishy about the sister, Diane. Why is she pushing so HARD for reunification? I do agree that in most circumstances, it would be best for the child to be with their biological parents, however, not when they refuse to put the child’s needs before their own petty sentiments.

If you don't like the kid your sister is fostering, just say that. There is no need to tarnish your own reputation by supporting abusers (substance and physical abusers)