Got into an argument with DS and he told me to "fuck off".
Not impressed at all, absolutely will not accept this, so have told him he is grounded for the rest of the summer - not to go out and see mates, no parties etc. He will only be socialising with us and family/family friends if I see fit.
DH thinks this is unreasonable. AIBU and if so what sort of punishment would you think is reasonable?