I clean for this young couple and the husband oversees me every other week. He lets me in and periodically cks?

by coming home from work about once an hour to say something. This is the second time he's done this. The first time is understandable bc I'm new but why does he keep on coming home to check on me. I clean for the whole family and plus no one ever comes home when they don't have to. What does this mean? Is he paranoid or bored? What does it sound like to you? He's not rude or paranoid acting either. And he wouldn't even have a reason to be paranoid bc the whole cul de sac is always watched.