She needs to get a job. Hope she is not planning on staying home while collecting a "salary" from you.
We went through a somewhat similar situation with my wife's daughter. Came here and because she couldn't drive she really couldn't get a job. I put her to work in my office but she was unhappy as she had a graduate degree in business analysis that wasn't doing her any good in our town. With the help of one of our ex-friends she ran away, or relocated without telling us where. She didn't want anything to do with us. Didn't see her for several years. My wife cried a lot over this. While were out of her life she moved to Boston, got a great job, got married, and had a child. While searching online I came across her Instagram account and found out about her child.
Long story short, mother and daughter reconnected through a mutual friend. Took some time for the two to reconcile. Now the daughter and her family live not too far from us in Florida and they are quite close again.
A happy ending. I hope you can have the same one day.