S.L.
maybe you could take her somewhere for the day or weekend, just the two of you. Maybe something fun that she would like to do that is a little more grown up than she is used to. It might help bond you guys a little more and bring some respect back. Mutual respect is key. I was a HORRIBLE teenager and any action from my parents that made me feel like I was being treated like a kid or not respected was major feul to the fire. Honestly, I love my parents to death and did then as well but I didn't realize how bad I was to them until after I went to college and realized how much they did for me. I don't know how you make them understand before then. I think making her work for things is great. I always had to mow the lawn (no matter how embarrassing that was) and I made money for it and other chores I did. I was taught to save my money, etc. I'm rambling...but maybe a girls weekend or a girls day at the spa or something would be nice to kind of start over. She does have a lot going on in her life with the two families and new siblings. Make her feel special and keep instilling the same values. She'll always have her moments but just give her some space and keep doing what you are doing.