Would your 10yo return a courtesy?

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DS1 had a friend to tea tonight, lovely boy and very well behaved. Ate all his tea too.

When the boy first arrived (dh had collected them from school) I asked "you alright J ?" J replied "yes thank you, you?"

I guarantee DS1 would not have haved his friend's mum how she was? Have I failed terribly or is that normal for a 10yo?

My DS is 9 and DD 10, neither they or their friends do this and they are all generally well behaved and polite (in other people's houses anyway )

So long as your ds would have said "yes, thank you", that's fine.

Mine does the "and you" thing; but it is just a verbal habit rather than extraprdinary politeness. He was asked by a friend of mine (forties) if he had had a good term at school. His reply was "yes thank you, and you?" which was a bit daft