Answer:
Hemas mother has a strong connection with her Bengali culture as well as the culture of being a mother. She speaks to Kaushik in Bengali but also has the compassion and care a mother has for her child which is universal in all cultures.
Extra: In the Bengali culture it is not acceptable to wear certain types of clothing such as dresses and skirts above the knee. It also has a lot to do with my religion and a lot of the times families are influenced by the religious background.
Hope this helps!