Typically, when children come into care--I was a foster parent first--children are not attached to you. They don't even know who you are. You're a complete stranger. When they come, you have to work through attachment issues.
With that, for an adoptive mother, I have seen children into adoptive situations and the children have left me and gone to a new mom. Initially it's all exciting and everything's wonderful, and then the moms, when they realize the child is missing me and I've been able to transition children into their home, feel a sense of rejection. So I have had to help moms get help because they're embarrassed in a way that here they dreamed of this baby or this child for years and then the child came and rejected them.
Because mom is the one at home. Dad comes home.... It's not always this way, but dad comes home, plays with the kids, it's all fun and everything's wonderful. Mom's there all day long, and the child is crying and upset and behavioural after the honeymoon period is over because they're missing what they once had.
So there are times that moms need to have support to get the help they need, a place to go to say “This isn't what I signed up for. This isn't how I expected it to be.” Time heals those issues.
There's a family I have worked with for years, and I had to hook her into an attachment specialist so that she would bond with her child. So I have worked with adoptive families when they've received their children, and the attachment issues have been big and secret.