I always leave work by 3pm and arrive home by 7pm. My house girl knows that. But once a week, I leave work early so that I am at home by 2pm. I do that on random days just to bust her and find out what shenanigans she’s up to.
Because of this strategy, the girl avoids engaging in big time mischief like bringing men to the house, or neglecting baby girl because she knows mama might pop in any time unannounced. Now I wish other working mothers would also embrace this strategy.