Kayano you poor thing 
When we took DS I insisted to the SW that if mum had another baby they HAD to ask us first. I was desperate that the siblings stayed together. I couldnt bear the thought of my DS's brother or sister going somewhere and him not knowing them.
She did have another, not that long after DS. Because she had moved, was a bit older, knew the system and her brother had moved out and all the social workers involved in the original case had left - she got to keep the new baby.
How am I going to help my boy to understand why he couldnt stay with his birth mum but his sibling could?
Breaks my heart.