I feel your pain firsthand.One of our grandchildren was placed in our home as a foster child.we had him from age 15 mos.until he was 4.When his mother got him back it was well over a year before we saw him again and his daddy didn't get to see him for two years..
We now see him weekly and so does daddy.No matter what garbage he had his little head filled with he still wants to be with daddy and us..when he comes here he calls it coming home..I will pray for you ,your family and the children...I know what it's like to go through this.