Give your seat up on the bus or subway

In Delhi i was traveling by metro on 30th April 17' from Noida city center to Karol bagh journey of 40 minutes, I was on my seat setting properly and studying, one family jumped in metro they were standing, i was not much concentrating on them but suddenly one thought came to my mind ' same like this my mother and father must be traveling and they must be standing what i was to suppose to do, i suddenly stud up and offer them a place.
i feel as if i helped my parents.