I think so cos my sister-in-law gives quite a lot of money to my mother-in-law monthly (although my mother-in-law always says that no difference for every son and daughter)! My husband doesn't believe me for this reason but.... I'm a woman, I know! In addition, they are "mother and daughter"!
I argued with my husband but of course....he's not happy that I talked with his mother, although it is not reasonable that no daily congee, no bath.......
I think the only method to resolve this is to hire a maid but my husband disagrees. The reason, I think, is to save money.