Instead of think of it as kicking her out, or throwing her out, why not think of it as letting her go to live her life the way she chooses. You have every right to run your home the way you want and she has every right to live her life the way she wants. When the two don't mesh, then something has to give. I'm not sure of the laws in your state, but in Texas, she isn't legal to drink until the age of 21. There's a good chance she's going to get herself into a good deal of trouble if she continues down the path she is currently on. Those problems will be hers and not yours and they will be consequences of her bad choices. Sometimes, it takes something really bad like that to bring them to their senses. Sometimes, even that isn't enough. In any case, your younger daughter deserves a home free of all that chaos.