I will say (with no intention is offending you or your daughter) that I would feel immense appreciation towards you if you were my mother. I was on my own at 16, and could never depend on my mother for help in any manner, my mother was an addict and really had nothing to offer, not even a house. Even with those awful situations my mother and I have been through (many more to much to list), I absolutly respect my mother at all times and if I didn't I'd feel horrible about myself...(even if she deserved it).

I'm not sure what you could say or do...but if it were me I'd tell her to get out of my house next time she got snotty with me. You have to remember it's your house and you should not have to live that way in your own home. If you were to tell her to leave, she is an adult and surely would survive....and forgive you later definitley. I recommend not tolerating it.

Discipline is tough, but very much love.