I am new to all of this, but I need someone to talk to! When me and my fiance met, he had a 7 month old daughter who he has joint custody of (we have her every other week) and my son was 3 months old, and his dad is incarcerated. Here we are now and they are both 9 years old and we had 3 little girls together. recently SD has become very hateful, mean and always angry. She lies to try to get me in trouble, treats my kids like shit, and just walks around like she is queen bee. My kids are starting to act like her and I can't stand that.