S.T.
poor little guy. what a lot of huge, bewildering, terrifying life changes. it would be weird if he DIDN'T act out.
your boundaries for good behavior need to stay consistent, for a host of reasons but germane to this question, so that he has a foundation. with everything in his life in such uncontrollable (from his standpoint) flux, he needs to know where the absolutes are.
the main one is that mommy isn't going to leave him. the others, some of which will involve consequences for bad behavior, are important but less so than the first.
the first thing i think when i see a parent complain that their child won't listen is 'is that child feeling as if he's being heard?'
that's not about sitting down and forcing him to 'express his feelings'. it's an ongoing daily dialogue that involves you constantly re-opening the door he keeps slamming shut.
so if he breaks something, it's probably necessary to remove his stuff, or remove him from the area where the breakable stuff is, because that's a natural consequence. but it's also necessary to understand that this is a metaphor for the rage and fear over the broken reality of his life that he had thought was reliable and constant. so this isn't a case where i'd banish him from my presence. this is a small person who needs an awful lot of patience and reassurance that his world is still safe so long as mommy's in it.
that's not something you can explain to a bereft 5 year old. it has to be demonstrated over time.
khairete
S.