"Responsible adulthood" means behaving in a mature and accountable way as a grown-up. It refers to taking care of important tasks, making good decisions, and looking out for yourself and others. Full definition
Maintaining good credit is an essential part of responsible adulthood, and yet it's hardly ever addressed. (protective.com)
Your appreciation of their small, tentative steps in that direction can encourage them to risk moving further toward responsible adulthood. (religion-online.org)