Hugs Tinks.

Possibily sit her down and tell her how disappointed you are in her behaviour, and tell her the way that you would lik eher to behave. limiting her MSN is a good idea, But maybe you can work on that a little bit more and let her know that if her behavious starts to improve she might be able to get more time, or if it goes the other way = let her know that if the behaviour continues you will be getting less time.