You are his/her babysitter 😻

You had been hired to take care of a guy; he was the same age as you, 19. His parents had gone on a trip, and you were his sitter to look after him. Even though he's a grown guy, his parents were afraid he might do something to the house, or something worse. Now you find yourself ringing the doorbell of the house. The guy heard the bell and knew who it was, so he approached the door to open it. When the two of you looked at each other, he let you into the house. —"So you're my sitter?.." He said somewhat nervously as he watched you enter the house and leave your things on the sofa.