It contained two very young babies. She immediately moved into the role of mother not only for those babies but for all the children in the carriage. She could have withdrawn into herself and somebody else would have taken on the task - it was not a matter of right or wrong. But she chose to take on that particular responsibility and obviously grew from dependent child to young adult in those few moments. When the train stopped in Holland she vociferously fought Dutch authorities to allow those babies to complete their trip to England, as their parents has obviously wanted, and possibly saved their lives.
Responsibility is one of the essential ingredients of becoming a mature adult being.
If we are to live reasonably full lives then we cannot ignore it. To grow we have to be responsible for ourselves and our actions, or inactions. Certainly we can avoid responsibilities in many ways - being absent, using drugs or illness, refusing or denying, being too busy, even dying. But presuming we want to develop as individuals then responsibility is something we have to embrace. However, responsibility, if not dealt with positively, can become a great burden that drains us of energy and enthusiasm.