my wife is insecurity

 Help me, i am a muslim married man with 4 children, i live in the same house with my mum and two orphans girls she is taking care of.. for 18 yrs together with my wife i never allow her to cook and send some to my mother in the house who live in two bedroom apartment while my wife and kids live in four bedroom apartment in the same house.. i never allow my wife to cook and send some to my mother bcos i always provide same kind of foods stuff in my room to my mum too so my mum and the orphans there always cook.. if i buy 4 bags 25kg rice bags, oils, yams, palm oils, fishes, gas, charcoals etc i divide anything into two and take one to my family while i give my mum the remaining one..

My mum never complain but my wife rather feel insecure. Her reasons is she must cook for my mum but i refused , my self i dont even wait for my wife to cook for me and the kids , i can cook all dishes my self based on the training i get from mum while growing, in a week i cook 5 times while my wife only do two times.. how do i make my wife stop this wahala she is raising? Must a wife cook for my mum? Is it force? I am getting feed up. A story from a worried brother.