Back in the long ago I had a Dobie. I knew her parents and one of her grandmothers. I was with this dog practically from the day she was born.
She did not like kids. But, she was MY dog so I kept her even though I had a niggling feeling that maybe I shouldn't.
She nipped my son when he was toddling about. That day she left the house forever. It wasn't a full on bite and he tumbled towards her when it happened, I was right there. She wasn't being aggressive, just her dog self.
I truly feel for you but I would, were you to ask my advice, tell you to find her a home tomorrow.