LoL, she is working him hard.
...
I'm still not impressed by them washing hands in used water - that might be the thing she's not comfortable about, too. And how does she know the Marquis has done this change in all his stores? Or that they won't go back to their earlier ways as soon as they have the contract and the Duchess no longer does inspections? Unscheduled inspections are better.
Anyway, if the Marquis does intend to follow her words, and transforms his other stores, even if he doesn't get the contract, he is already doing better business.