We're not married so technically not step DC but will use the term for ease.
My middle DC really doesn't get along with BF's DC to the point where she refuses to come anywhere with us and begs to visit her dad or grandparents to avoid spending time with him. BF and DSC often stay over one night and day of our EO contact weekends but I've now suggested we stop doing that. They fight argue and bicker constantly when we're all together although occasionally they will get along, more so when we're out doing something. They are both 7.
My relationship with BF is really good, I'm mostly happy but this issue really bothers me. We can't visit him at his house for reasons I won't bore you with.
Has anyone experienced this or has any advice for me please?