Start by finding out if she is even the legal guardian.

She's legal guardian. She's going to most likely get full custody. She's had some issues with DCF, but they know they can't take them. There is issues with the house. It's trashed atm. Me and her other daughter are going in this weekend and cleaning that out. The mother and father are addicted and have lost custody of the 2 yo. The other two are from another relationship and are full custody to grandma.

breaking up that group presents its own set of problems

It does, but DCF already is grasping as hard as they can to get the 2 yo. The 2 yo was just introduced into the home. They've only had a few months of interaction. There's already a divide there. The 2 older children can not be seperated. There are also other issues with those children. The younger of the two is basically disabled because of in-utero drug use. My wife does not like the idea of all 3. I don't like that idea either. We're just getting started with out own. Adopting a special needs child is something that I don't know that we are up for. It's complex, and I don't want to rule it all out.

Really what I have to do is support the grandmother as much as I can, to keep them out of Foster. They are safe. That's all the really matters. There are amazing fosters. There are some real monsters here. That's a terrible roll of the dice at 2.