I must be treated different if I don't have childrens with my husband?

I have a muslim husband and me I am not. When he asked me for marriage I told him that I will not make him chidrens because I am much older than him and the nature say it's word. I had before children's with my previous husband. My question is: should I be treated different from the womans who have children's with their husband from the point of view of food, clothes or other rights of muslims wifes? Should I be forced to give 50% of the expenses in the house because I don't have children's?