Bio and step child don't get along.
I have a son who is 2.8 years old, and then I have my 6 year old Stepdaughter. My son is not my husband's bio, but he has taken care of him since we married and he was 7 months old. For the most part, he considers him "his son".
My son and stepdaughter do not get along. They can't play together without a lot of screaming, arguing, and someone (usually stepdaughter) crying and getting hurt.
A few weeks ago he gave her a very bad black eye, it wasn't playing, it was an accident in which his head hurt her browbone. Today, he threw a block at her and hurt her lip.
She is with us every weekend during school year, and about a week with us for every 3-4 days with BM during the summer.
I told DH that I need to move back to my country with my son because this isn't working. Living like this is very stressful and is not worth it. I said, "So what will be next, a broken bone?" to which he responded "if he does that I'd break his neck"... I mean seriously? No thanks, I won't stay with him with the fear of my son hurting HIS daughter and then him hurting MY son in return........
I don't know what to do. What do people do to make young siblings get along? We can try to keep them apart from each other at all times but that is stressful, and is definitely NOT how I want to live my life.
I also believe that this is only going to get worse...