I read this article recently and thought you might enjoy it too.
Adopting from Foster Care – What is it Really Like?
Here’s a snippet:
Adoption is born of loss. As wonderful and beautiful and amazing as adoption is, it starts with a loss, especially in foster care. A mother and father lost their children. Grandparents lost their grandchildren. Siblings are separated. My children lost countless family members, most of whom they will never see again.
myMCMlife.com 
This is so true and so hard and something we are walking through right now. It’s such a fine line to walk between celebrating a new family and mourning the old.