Our mg is layed back. We only really intervene if there is a major arguement brewing or it's getting physical. We are so lucky that we are so relaxed. It's share and share alike. A sippy cup is up for grabs same as food, LOL!! Half the time we go home with each others stuff.
It has taken us over 2 years to get like this though. Hope it settles down and starts being relaxed soon.