Muggle Music & Hershey's Chocolate

What if Regulus had escaped with Sirius to James? What if Sirius started to see another side of his brother? What if Sirius saw something he shouldn't have? How much can opening the door at the wrong time once change? Warning: Child abuse, Some trigger warning, borderline poetry, unforgivables, borderline M AU/Some OOC Summary much worse than story. No slash. R&R;!