Relatives Rights for fostering blood relatives

Everything about this case has been done wrong. We are now not able to contact our nephews unless we go through the caseworker now. They are trying so hard to push us out it is crazy. They are looking at us like we are the mother, and we are complete opposites. There are so many kids that need a good foster home that do not have families fighting for them, but in this case the foster parent does not want any other foster kids but ours. The only reason they are fighting so hard, is these boys come with money with their dad's accident, the only reason they are putting us through this. There was no relationship before the accident. I am not sure what else to do.