My mother-in-law treats my child unfairly because she dislikes me

My husband is the eldest sibling, with a sister and a younger brother following him. We reside in the city, whereas his siblings live near my in-laws in a rural hometown. My in-laws, who were once well-off from their business, have retired and passed the enterprise to my husband’s younger brother. He has successfully expanded the business, allowing him financial prosperity and a flexible schedule. He also assists my in-laws with various tasks since he lives nearby.

My husband and I, both salaried employees, live farther away but maintain regular contact, with my husband frequently calling to check on them, and I also call occasionally to inquire about their health and let our child speak with them.

The problem arises when we send our child to the countryside. My mother-in-law does not show the same affection to our child as she does to her youngest son’s children, whom she dotes on visibly. It is apparent she acts this way deliberately. If I were absent, she would likely disregard my child. Despite all her grandchildren being about the same age and my child only visiting occasionally, she remains uninterested and never inquires about them.

This indifference feels particularly unjust to my children. If she harbors dislike towards me, it should not extend to my innocent child. Despite her religious activities, which include going to temple and reciting scriptures, she holds grudges. I have spoken about this with my husband, who advises not to confront her on the matter. While there are other minor issues between us, they do not affect me as deeply as her unfair treatment of my child.

What should I do?