Balancing roles of two women running one home

ok with my recent visit from inlaws i made no clear rules but still had some.. my mil would do whatever work she wanted to. so if she wanted to cook i would back off n tell her i'll do something else. if she didn't do any work whole day i used to engage her n ask directly" aap zara....ker dain gee?" however she loves washing dishes after meals so i left that for her mostly.she put everything back in wrong orders so i would say loudly"ye bachchay bhi na yehan glass rekh daitay hain jub k glasses is cabinet main jatay hain" or i would scold them infront of dadi for putting dishes n spoons in wrong drawers. lol. she did get some message.
as for cleaning my fil would clean the room they used. kids had to clean their rooms. n my room i wanted no one to enter. so i would say directly to everyone in house "please mera room koi clean na keray. mujhay baad main pata nahi chalta konsi cheez kehan hai". i used to keep the doors closed when i was out of the room as a sign no one enters there.

as for going outside mostly invited her. but sometimes hubby n i would just say" falan jagah ja rehay hain. bachchay gher pe he hain. plz daikh liay ga"
sometimes hubby invited her to come along n i would look at another wall n seeing me showing no interest she would not come.

so ur rules could be
Everyone clean their own room n attached baths. i clean mine. kids clean theirs. daddi cleans hers.
kitchen we'll do together.
laundary ammi can wash n everybody takes away their load.
vaccum i'll do
grocerries dad can do etc

as for going out
the days u wish to go alone try one of the following strategies
* "friend ne invite kia hai.only hum he hoon gay"

*go out at a time she takes nap

*say u r going gym / bank / library or somewhere u r sure she won't like to come.
some days make her wait in the car"main bus abhi ayee aik min main n take ur time."