so my 2 and a half year old son is being so rude and strange around his grandparents. they live 5 mins away so they know him well but every time we see them he keeps saying 'dont see me' and being really rude. also when we are with friends with wee one the same age he gets all aggressive. i keep telling him dont talk that way as its not nice. I get mortified. Is all this deveopment or personality. anyone with similar