Really?
Why do people have to throw in their opinions on rehoming due to a baby? You don't know the whole story. I'm sure it's not what the family ideally would like to do but they might have to. First baby, high risk pregnancy, premature baby, high maintenance dog, no time...just wanting better for their dog. Been there, and it hurts.
Put yourself in someone else's shoes before judging...words hurt, even if they are strangers on the internet.