Tisha offered to clean your room, since you refused, and she couldn't stand how messy it was! She was dusting, humming quietly to herself as you sat on your phone. She loved to clean, so you didn't offer to help her. It's not like you asked her to do this anyways.

But she is quite the neat-freak. She's even cleaning off your dresser and the corners of the room, which you never did.