My nephew has been staying with us for a week and I have been surprised by some of his behaviour so would like a bit of a view on whether it is okay.
He is incredibly competitive so everything is a race and or competition - down to eating quickly/ going to the loo quickly etc. My DCs are younger and getting a bit upset by the constant attempt to start races and competitions followed by gloating when he wins something. He generally invents them out of the blue so although i try to calm it down, it gets out of hand very quickly.
He is very aggressive at times. DS was playing happily this morning by himself and Dnephew went over and pushed him off his toys. I told Dnephew off and said it was unkind, he then came and stood very very close to me, pushed his face into mine and shouted 'take that back you bitch' really loudly. This was followed very shortly by 'don't you dare look at me like that or I will smack you'. I told him I wasn't prepared to put up with that behaviour and that if he couldn't calm down he should go back to bed. He did calm down but I felt a bit shaken and ridiculous for being upset by a 6yo.
We have also had some difficulty with him claiming he is allowed to do ridiculous things at home (that I know are forbidden) e.g watch 18 films, drink litres of coca cola etc and then has tantrums when we say no.
Is this just testing boundaries at a new place (and boy, is it testing!) or is there actually something to worry about.