We agreed years ago that I wouldn't try and be the third parent in the DSC's lives which meant leaving reinforcing house rules, behaviour etc to DP.
Never turns out quite as black and white as that and the usual frustrations with each others approaches bubbled up on more than one occasion.
Last night at dinner, can't remember what was said exactly to cause this but DSD14 pipes up with
"You can tell us what to do as well you know, we have been living here for four years !"
So I asked if that was ok with all three of them, and they said yes.
A corner turned?