Hi, I am am mom of 4 and a stepson. I from the beginning had a grand delusion of everyone melding together so that when we were all together we would be a family. My stepson attitude changed as soon as me and his father for married. The tantrums started, I feel like he tries to manipulate his dad through his grandparents who spoil him and in turn it causes stress in our household before he even gets there. It is sad because the house runs like a family until he is in the mix.