Me and my step daughter do not get along. My wife and her step daughter (my daughter) do not get along. At the start of being a belnded family we were not acting right in the home and today we do not care for each others kids. Blended families are damn hard. I have learned and accepted I do not have to like my step daughter or visa versa. Step 1: Put your arm out. This isn’t specifically part of the method, but each time I see aggressive behavior, I always intervene using the least amount of physical intervention needed. This usually looks like me placing an arm between the kids to block them from continuing to hit or kick. The majority of the time (like 90%) I don’t need to.