The joke's on who?

So Aile and Brenner are supposed to be sleeping.  In fact, they were supposed to be sleeping a long time ago.  For some reason, tonight they are completely wired.  A few minutes ago, amidst uncontrollable giggling, I went in there and took Brenner down from the "sleep over" they were having together in Aile's top bunk (of their own accord, not with permission), and told them to be quiet.  A few minutes later, this is the conversation I overheard:

(All in forced whispers)

Aile:  "Brenner!" 

No response.

Aile: "Brenner!"

Brenner: "What?!"

Aile: "Knock! Knock!"

Brenner: "Who's there?!"

Aile: "Please!"

Brenner: "Please, who?!"

Aile: "Please go to sleep now!"