So mom has made herself a friend as well, and not a parent?
Interesting.. Sounds like he is definatly mad about you as well as being his friend and not his mom.
Has she asked him why he is throwing things at her, like had a real sit down talk to him, kind of deal? With or without you around?
All of these behaviors really arent that bad as far as dealing with in the long haul and i believe can be alleviated, with a little emotional work with him.
can you answer all of copperheads questions please?
Good article at babycenter.com
As much as i hate the term "use your words" its very beneficial. A toddler may not fully understand why they are mad,but lashing out is the easiest way to deal with it, but helping them to figure it out, is a key to stopping the bad behavior or preventing it from happening all together.