DS is 3 in August and most of his life he has been a quiet, serious, gentle little boy. Until this year. Suddenly (and yes I know he is 2, but it's getting worse) he has become more violent to those around him (except DH or myself - he doesn't do anything to us). It includes pushing mainly, but also hitting with objects, taking toys, and sitting on his little sister or trying to squash her in to corners or objects.

Everything we try just doesn't seem to get through. And when he smiles and laughs when we catch him in the act it just really makes my heart sink.

His verbal skills are coming along, but they aren't super advanced so trying to have an actual conversation about it is not actually possible. So it has to all come from DH or myself.

Can anyone offer any suggestions/encouragment before we end up having his little sister seriously injured (who is only 1 today and not yet walking) or I snap? I want my lovable gentle boy back.