Does it make sense for mother-in-law to wash underwear for daughter-in-law?

I can only blame my mother-in-law for being too weak. Why did you wash her? A mother-in-law should care about her daughter-in-law, but what is this? You are conniving! ! ! It should be traced back to why there was the first time and what prompted her mother-in-law to wash her daughter-in-law's underwear for the first time. So that it became a habit in the future. If it is because the mother-in-law washes her underwear like her own daughter, even her own daughter should learn to be independent.