Does your parent /guardian ever leave town and your special needs sibling started to act bit more agitated then normal? Well it's o.k. if so. Because they just really miss them. But trust me I’m not excusing if they’re too pushy or even curse a little too much. Does this ever happen to you? I actually have no idea why they act like this when a parent/guardian leaves town. My only guess would be that their probably upset and angry, and maybe those feelings transfer in their mind to be that, that person that left them [probably only for a couple days or weeks] are gone forever. That would be my only guess.