Don't question this, Dorcas. You weren't there. You weren't there for the patroni flying all over the place, trying to find any scrap of information we could. We didn't buy it like it was some sordid Witch Weekly conspiracy theory. All logic pointed to him being Secret Keeper, then they were slaughtered and Harry orphaned. As it turns out, it was Peter who sold out his best mates. I don't understand how that is possible. It seems anything is. We had a mole. It had to be someone. It being Sirius isn't - or wasn't - outside the realm of possibilities. Fact is, the mole was - always was - one of us. One of us was selling out their friends' lives and the lives of their families. It was two more fucking lives gone, and an explanation that makes sense.
So step off, Dorcas. It was a fucking terrifying night, and you shouldn't sit there and belittle it because you've had the luxury of knowing who it was really was.