Property query

My husband and I stay in his fathers house as a joint family comprising of my mother in law, father in law ,husband, me , sister in law and her kid. All household expenses are majorly borne by my husband for min past 10 years. My father in law pension is used for minor expenses and his own pocket money. Wanted to know my sister in laws right in the house even though she is not spending a penny on anything?Money was spent on her wedding (not sure if husband contributed )however she is spend thrift and makes my husband spend on unnecessary things and since she is younger my husband feels his duty to spend on her. The problem arose post my marriage when I stopped unnecessary expenditure as my husband didn't have any savings . Also despite the entire expenses of the marriage was taken care by my parents my husband had taken amounts from his PF as well as taken loan of atleast 13 lakhs during the wedding which is not telling me the accounts for.Ideally the house belongs to both however the fairness is not there in this case. My Sister in law is the younger sibling and all of them want to give her everything but what about me and his future with no savings and house? what do you suggest?