My in-laws not supporting my husband(their son)

Hi, My husband doing business. They are 2 sons to their parents. My husband is older one, both are married. We live in bengaluru n my in-laws live with younger son in native. They help is younger sin financially in all aspects like bought tractor to him n all. But my husband studied on loan n he paid installments. He gave all his pf money to his brother marriage. And after that during covid time give his profit from business(resigned job) to his parents for developing agricultural land. While doing job he took personal loan to construct home on native, n buy all the household things un his salary. Till today he only giving money to majority of things. Now my husband got some financial problems in his business so asked money with his parents, they are not ready to give. So he stopped asking them but asking me to ask my parents, what shall I do? My husband will give money to his family when he have money but keep distance when he don't have money. How to handle my in laws and his younger brother to stop them asking money from my husband. And how to take financial help from them.