Today is a rare weekend, and the wives at home don't have to work or go to school, so they're all staying in.
Actually, even though the women at home work every day, they all have weekends off.
This is also a rule set by Jiang Siming, allowing them to work to earn money for themselves, but they must have time to rest.
He doesn't want his wives to work just for money. Money is like a bastard, never enough to earn.