What a horrid thing to say to Meadow in her time of need. Do you have proof to back up your statements to her being a "bad" mother. I take this to heart since I am a mother of two children of my own. I would be beside myself if S.S. came and snatched them.
Meadow *huggles* i know this is a very tough tiem for you and your hubby. But I think I might have a solution to getting your lovely children back home with you. Inge from Simlogical has a teleshrub, place that on your lot. Have both kids teleport onto it, then hit the "move in" option. That should work, hopefully. If not, then I guess them living with their grandparents are so bad. You can still visit them.