Bade Ghar Ki Beti 1989 on netflix

Mala is the daughter of Kishanlal who works as a servant with a wealthy family. One day Mala meets with the owner of this family, who is so impressed with Mala that he asks for her hand in marriage for his fourth son, Gopal, which Kishanlal humbly accepts. As a result, Mala gets married to Gopal, and moves in to their palatial home. While Mala is extremely helpful and sweet-natured, the rest of the daughters-in-law, three of them, are quite the opposite.