Contingency, if my math is right, two years ago the sister was only 18, and probably not the most likely candidate for placement. Two years have gone by, and she has not forgotten her little sister, and by all accounts seems to be trying to do the thing we would hope all families would do; take care of their own. It's a sad situation, and I feel for the foster parents, but if the sister can show that she can provide a suitable home, I think it's pretty unreasonable for the foster parents to fight them and create this acrimonious atmosphere between themselves and the child's biological family. It will come back to bite them, regardless of the outcome.