My DS is usually a very well behaved child. He has randomly started to tell his younger sibling, me and DH to “shut up”, “go away” and calling us “stupid” “idiot” etc. he fully understands these are naughty words and laughs because I get cross. I have absolutely no idea where he has learnt this stuff - it’s not the sort of thing we ever say at home and I assume it’s from a couple of summer clubs he has done. I’m feeling a bit down about it as he keeps doing it and I would really love some advice on how to handle please. He does say sorry afterwards but then he just does it again so 🤷🏻♀️🤷🏻♀️🤷🏻♀️ He’s my first as well so not sure if everyone just does this or it’s just him! Thanks all