Sirius walked into his- no, their- flat and tossed his robe on the couch. "Em?" he called. "I'm home!" There was no answer. She's probably in the shower, he mused as he started to cook dinner. I'll surprise her, he decided. He whistled as he made grilled chicken with mashed potatoes, which he knew was her favorite. He set the food on the table and then walked into their bedroom across the hall. "Em, are you there?" he called. There was no response. Slightly worried, he knocked on the door of the adjacent bathroom. "Em, are you okay? Please answer me." There was still no response. Now fully panicked, Sirius opened the door and was greeted with a horrible sight. Em was lying in the tub, which was full of blood, and a message on the wall read: "You killed our Lord. We killed your blood-traitor wife." Below the message, there was a drawing of the Dark Mark. Sirius was in pain. He couldn't breathe. This couldn't have happened, not to them. That was years ago, why now, why now? Why his Em? We were going to get married, he thought, remembering the proposal. And now she's dead. He magicked away the blood and cradled the mangled body of his only true love. That's where Remus found him, lying on the floor cradling the cold body of Emmeline Vance.
