in loco parentis
Responsible for a child's wellbeing while his or her parents are absent. Does being a teacher ever make you nervous, having to be in loco parentis to so many young kids?
in ˌloco paˈrentis
(from Latin, formal) having the same responsibility for a child as a parent has: Teachers at a boarding school are acting much more in loco parentis than at a day school.The Latin phrase means in the place of a parent.