He doesn't take any great pains to shield Shinjirou from wandering eyes. If anything, he angles them so that his new purchase is fully on display, free for anybody to stare at if they care to. He'll have Shinjirou doing much worse soon enough; why not get him used to it now?

"Cleaning in general, yes. You'll also be doing the cooking, the gardening, and entertaining my guests. I hope you're up to the task."

If not, there are always books he could learn from. Jade doesn't plan on doing any teaching.