I am a stepmom of 2 girls age 7 and 10... I have been around for 5 years. My husband and I work alot so they are only with us part time 10 nights a month. If you read a recent post of mine, I was venting about the younger ones behavior...we have tried so many things, grounding taking away things reward chart systems counselors and it does not fase this kid. She doesn't care who she hurts and in my eyes she bullys everyone. Her mom is on board with punishments and follows through at her house (she says she does although I'm not sure)... it seems she doesn't misbehave as much there as she does here. This has been going on almost 2 years on and off with the extreme behavior issues. She use to punch herself and scream as loud as she could to talking back and says the meanest things. Last week I think some truth finally came out...she told us she didn't want to be at our house, she wanted to stay home because she misses her mother. Her mother since I've been around has been in school works full time and goes to the gym every second she can, so I can imagine she misses her mom. They are mostly watched by their stepdad whom does not work. All I can really think of for behavior, could it be lack of time w her mother ? Is that just an excuse? Why so bad with us and not over there? We have a nice house with consistent routine and expectations. The older one rarely has an issue. I'm the step parent so I mostly keep my mouth shut but it's hard not to think of because the days they r here are the only days my husband and i have off and they r usually ruined because of the extreme misnehavior. We are lost on this one.