Not being a native, but largely a self-taught grammarian (help welcome) this is how I would interpret it:Originally Posted by Nanatuha
simple present=fact -> it's a statement, not to be discussed because self-evident
The chambermaid here has a motherly attitude in spite of the different social status, she knows what's best for the guest.
The fact that she uses the adjective "good" is another indication of this role-play : she gives an order, but at the same time she appeals to the common sense of the guest, the way a mother would tell her child "you're a big boy now" (you know what's good for you).
Student or Learner