Stop lending her money, stop doing her washing and if she comes home with a bunch of friends and alcohol ask them all to leave.

Its your house, she is still a child under your roof (I dont care if she pays bills or not). Either she lives by your rules or she leaves. Its because you are trying to avoid her tanties that she behaves this way - because she can.

She is acting like a 10year old with too much pocket money, you have to pull her into line. Yes it's tiring but the consequences of NOT doing this will be far worse. She still needs to be mothered and shown the right way to get on in life, she needs you to show her how to do it herself, not you do it for her. Thank goodness your lease is up soon....

GL