{{{{{{{{{Parker}}}}}}}}}}} Sounds like you're on your own if your son isn't going to keep his word to you. Don't involve him in anything else. Again, think real hard about whether you can do this or not. Regardless, you're that little girl's only voice. You need to speak up for her!
Is there another family member that could care for your granddaughter on a steady basis?
I've seen too much crap go down when kids get put in the System. Again, I say, do all you can to keep your granddaughter out of it.
I'm here if you need me.
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.