DS is 3.9 and has (anti) social skills which are coming slowly slowly. One manifestation is a really ferocious defensive streak - he goes to nursery and is fine on 'neutral' territory with sharing toys etc. If anything over-diffident. However with visiting children he is extremely prone to full and embarassing meltdown if he perceives them to be interfering with his things. Never physical aggression, but big-style histrionics and verbal unpleasantness. The stern approach tends to a) bounce and b) get the attitude entrenched, though we don't tolerate the behaviour as not fair on other kids involved.
Anyway, we have rather rashly invited an old friend and his 3 kids of 5, 3 and 6mths to stay for the weekend. DS hasn't met any of the kids, so a tall order in anyone's book.
Please can anyone offer any advice for getting through the weekend without blood on the carpet on anybody's part?