It's also a much bigger emotional trauma to go from being a long time only child who has been accustomed to being his parents' first priority than it is for children who are already used to having siblings. That can be tough even when it happens in an intact family.
I agree I think it must be hard going from being with mum where you are an only child and can be her top piority 24/7 to being I wouldn't say bottom of the pecking order but I would say that he is below ds 3 in terms of me and dh priorities simply because he is younger and has a disability. I would say if you take ds out of the picture then all of the children are pretty equal in terms of attention and piorities.
Dad allowing him to discuss his frustration/anger/sadness about the loss of his nuclear family, Dad's move to live further away,
They have been separated for quite some time now and I am sure would have spoken about this before I was even on the scene.
We moved about 4 miles further away we are only 12 miles apart it is not that far. We had to move because we were renting previously and we decided to buy. We also moved for better transport connections as dh needs to commute by train into London. But really not that far.
Dad and telling Dad he's frustrated/sad/feeling excluded is more constructive than focussing them on his little brother.
I agree but I think that is up to dh to do, I will bring it up with him.
That just gives you a new target for the nagging - DH instead of DSS!!
I have to nag otherwise the clutter would build up to unimaginable levels.