I have a 10yr daughter she is more or less an only child,She is my pride and joy, I praise her every chance I get. She gets great grades and I post them on the fridge for everyone to see. Her dad left us before she turned a year old, He is in her life.. He sees her every other weekend. I have remarried (3 yrs)to a wonderful man who treats her as his own.. He has an 8 yr old son whom we get every other weekend. My daughter and my step son get along pretty well. I had a job where i worked a lot of hours and did not have much time for family.. I have since lost that job.. and now i have a job where I can take her to school and pick her.. So, now i get to spend that much needed time with her. I recently, in the last 2months have taken in my 8 yr niece. My niece lives with us full time. The girls have their own rooms and pretty much their own belongs. Granted my daughter is use to be an only child.. this recent addition to our family has caused my daughter to be very angry. I have talked with my daughter and i understand that my niece is the problem and have tried working the issues out the my daughter, I have even had her talk to the school counselor. My daughter continues to be angry. She always has a smart mouth no matter who she is talking to ( adults / other children). she hits her self, she cries every time i try to discipline her. She thinks she can not do anything right, her self esteem is pretty much gone. I am really worried about her.. I need suggestions on how i can help her deal with this new situation in our lives. Anything suggest would help.