Ds1 ADORES a little boy who is...ermmm...challenging in behaviour. He has very little respect for adults - or other kids. He is very bright, dominating/ a 'leader' and totally leads ds1 (just 6) and others astray. I THINK his behaviour is a combination of his character and the way his Mum treats him (like a friend more than a parent). He seems to have no boundaries. Once he used the 'f' word walking home from school to ours and I told him I would have to tell his Mum, which I did. She just said, "Oh no, you shouldn't use that word". I've never really seen her tell him off or give him any form of discipline/ consequence for behaviour which is out of order.
Today was ds1's party. They had a few minutes upstairs to play whilst waiting for everyone to arrive. I overheard this child say, "Let's make a huge mess." I said, "I heard that ...., you'd better NOT do that (menacing voice)." Anyway, went downstairs to prepare the first game and deal with someone driving to us who was lost. Next thing I know the kids upstairs are going MENTAL. Most of these kids are really nice, well brought up kids who wouldn't dream of behaving this way, throwing stuff around, making an ALMIGHTY mess in ds1's room and his siblings' room. Even when I brought them down, they were totally riled up, screaming and running around. It was hideous for a bit. I can't totally blame him, but I did ask ds1 where it started and he said this boy's name. The others followed and before long, they were all going mad. Later when the party was over, he kept trying to go upstairs despite the fact I'd said no more going upstairs.
Ds1 loves this boy, and there is no way I can avoid him or steer him to others. He does also help ds1 as he's so bright and kind of pulls ds1 along with him in good ways too. Plus I don't want to be such a controlling parent as to sabotage their friendship. So, the friendship is on though I keep trying to bring other kids into ds1's life (he doesn't seem interested unfortunately). Do I bring the party up with his Mum? What do I say?