To be responsible one would have too.
It is not my child, the baby belongs to another Mother, so yes I would....and be glad to have my own child returned to me.
Very hard to do, but for all concerned....the best & right thing to do.
A baby knows their own Mother, so all would be well after the change over.
The Mother must have her own baby no matter if it was a week-month or even a few years.
Then off to the Courts to sue!!!! big time :(