I’m probably going to be in the minority here, but in the specific example your girls stated, I can see why the dr’s son was put out. I’m not saying your girls shouldn’t stick together, but if all 3 of them wanted to go on a 2 person slide, why couldn’t they take turns partnering up to do so? Maybe I’m applying adult logic to kids here, but that seems like the obvious solution and one that I would think older children might be able to come up with on their own.
Having said that, though, I don’t disagree with anything you said. If this were an isolated incident, I would say y’all could work through it and be fine. I don’t think it is isolated though. Sadly, I think this kid has some serious issues and at least part of them are not being addressed by the doctor. He’s adopted, disconnected from the only father he’s ever known and his mother, while a good provider who I’m sure loves him, demures to a man with 2 daughters who stick together and outnumber him. He now has to share the one person who has always made him the center of attention with a man who works to be kind to him but also likely gives off a bit of an uneasy vibe and 2 daughters who he perceives as “ganging up on him”. I don’t think your daughters do that, mind you. They clearly have a precious sisterly bond and that is fantastic. But he doesn’t understand that since he’s an only child. I just feel bad for the kid.
Me 52, H53 Bomb drop 9/29/2014 Divorce from XH final 12/17/2014 Marriage #2 12/31/2019 5 adult (step)daughters (3 from XH's first marriage, 2 from current H's previous relationships) 6 grandkids