T.T.
Hey C.,
I would have to say that I agree with some of the other moms. My mother did very similar things to me when I was that age, and my mother was strict and extremely consistent! Also you have to be willing to be the hard-a**. You are her mother, NOT her friend. You can be her friend when she is older, trust me, my mother and I are very close now.
Grounding works only if you are serious about it. I was grounded sometimes for two weeks at a time. Grounded meant no TV (I could watch with my dad but that was it... damn discovery channel...:) ), no phone, no hanging out with my friends, nothing! I had to skip a couple of slumber parties because I was breaking the rules.
My point is, be the parent, don't let her walk over you. I used to think my mom was a nag and wanted to ruin my life, because everything is so TRAGIC when you are that young, but as I look back I thank her all the time. There are so many people out there that aren't taught about consequences when they are younger and they end up making some of the most foolish decisions later in life.
My mom still refers to me as her "challenge" but I love her to death and she is the most awesome grandma too!
Thoughts to chew on...