Pumpkin Juice & Sunshine

She'd known that Sirius had a brother, of course. He complained about him all the time- loudly moaning to the entire common room about his stuck-up prat of a brother and how best to prank him. She had seen him around the castle before, sitting across the Great Hall or walking about with his Slytherin mates. None of that prepared her for coming face to face with him. One-shot.