I think with mothers and daughters esp it can be hard but youve got to look at it this way she may have something important God wants her to do and she can only really learn it away from her mother.
Daughters have to leave and they do it all the time, traditonally, daughters were sold or given away in marriage, Mothers never actually had the right to keep hold of them forever. Got to fly the nest sometime!!
I know this dynamic is painful but this is the whole thing with mothers and daughters, on one hand they want to be close and on the other they push you away. But mothers and daughters are not married to each other, so its not a bondage in that sense. (although for some of us, it seems like it!)
It sounds like you do, however have a loving husband who has actually promised to stick by you until you or he dies. At least I believe so, if I am wrong and you a widow or solo mother I apologise. The thing that you dont know where she is, like shes gone missing, just means you have to release her to God.
I had a friend who went missing and yes it was her mother who hurt the most. But I do know the friend was saved, even though her body was actually never found not because of her mother but because God was looking out for her...through neighbours and strangers and angels unawares. Jesus goes after that one sheep that goes astray, He truly does. Nobody can snatch them out of his hand.