This has been going on for a while, but is getting worse and I am losing the plot over it....
DS is 13, has some mild additional learning needs (processing, working memory and fine motor skills) and is small for age, nowhere near puberty yet. I also have a DS who is 8, and still in the sweet, kind, small boy stage, bright and capable with no learning needs. Boys are in independent school, they have a 'good' life, we live in a nice house with garden, they have their own bedrooms etc. Only mentioned for background/scene setting.
DS13 is so jealous of his younger brother, it is awful. He constantly niggles and nips at him verbally, criticising and being unkind, blocks doorways to stop him getting through, hides his possessions, issues orders, takes things off him, mocks him and laughs when DS8 cries. He also does it to me, with the door blocking and being obstructive, deliberately ignoring requests and instantly starting something else to avoid being helpful. It ends up with DS8 offering to do whatever chore it is for an easy life. He still has sufficient respect not to try it with DH, but he is now working away 3 days a week, and is out of the house 6.30am-8pm on the days he is here in the week.
It is never one large and obvious issue. But, when he is at home, he is like this ALL the time, constant micro-agressions. All I seem to spend my time doing is telling him to stop, issuing screen bans etc. Yet, at school, his behaviour is impeccable, he is the top of his year for rewards on this front, even though his academics are weak. He has a reputation for being kind and caring with younger children, is well liked by staff and pupils.
I am at the end of my tether with it and don't know how to resolve things. He is making the whole family's lives miserable, especially DS8. Being ultra nice with him makes no difference, he just sees that as weakness and gets worse.
Any advice most gratefully received.