Songfic to Wishes by Superchick, on Fenrir Greyback, Bellatrix Lestrange and Tom Riddle/Voldemort. T for being paranoid, once more.
"Oh, stop complaining, you know you pretty much love your life."
Narcissa faces sheer surprise at Bellatrix's reaction towards Andromeda's leaving.
When Harry Potter looks at Bellatrix's corpse, he discovers a letter that she wrote to Voldemort. One that the Dark Lord never read. Or did he?
Death took her before she could answer.
Lucius was no longer afraid to face the truth.
Just a quick idea that popped into my head about how Bellatrix got sorted into Slytherin: