Help me!! :(

[Lee-Bee]

Does he cry after nap? How long is he awake before he goes home? Is he the same in this period or different?

It does just sound like he is choosing to cry because he isn't getting what he wants (what ever that may be) and if home is catering to him then all the more likely he is crying because he isn't being catered to. But I can't help but wonder if he could be sick in some way. Maybe he is like this at home (hence the sisters annoyance) but there is a root cause. Possible ear infection or stomach problem that is bothering him? He was really sick as an infant could there still be something wrong? Not sure how you would pin down what if it has been going on so long.

Can you fit a high chair in the play room to put him in when crying? Or a playpen outside the playroom but close? If it is just behavioral I think the child will need a very clear consequence to the crying to learn to stop it. It could just be so ingrained in him at this point that he doesn't even know what to do with himself. In the least...you and the other kids deserve some distance from it and a playpen really would help. Especially for the poor sister that he follows at times.

Can the sister speak enough to answer questions about his behavior at home? When he is just crying for no reason can you ask her if he does that at home. If so, what does mom do? Maybe get some info from her? Obviously take it with a grain of salt...kids distort reality lol.