Regulus didn’t wait for any further prompting before turning back around to finish with the fridge. He had always felt the need for everything to be tidy—his surroundings, his appearance, his mannerisms. Sirius always suspected that it was a way for him to be able to control his life, especially during the times that it felt most out of control. It was rare that the need extended to Sirius’ space, though it’s not unheard of for Regulus to clean up their messes. There must be something going on in their brother’s life that he’s anxious about. At least Sirius knows now why their front door was propped open; Regulus must have thought their space needed to be aired out. 