My mother in law demand rent from me. My husband built a separate home for us on his mothers property that she is not alone. My husband does not work now and now m mother in law demands that i pay rent

Kanala advise me. At the moment i work and we have 4 children. I do not earn much. But i buy the food kids clothes. I put them through school and madressa. I do not earn much and cant see to getting me things i need as a woman. So i cannot afford to pay her rent as i do not have anything for myself.