Not my room

Hey derpy, go clean my room! Why me? It's your room? Because im you older brother, and i can beat you up! Now go clean my entire room! okay...
50 minutes later: I'm all done! Your room is now entirely clean! What took you so long? Where is all my stuff? Mom! What's wrong? Why are you crying? All the stuff from my room is gone? Derpy did it! Derpy is it true? Not my room!