"Not my daughter, you bitch!"
Bellatrix laughs at it- what a pathetic, miserable excuse for a woman, challenging her, Bellatrix Lestrange, who has killed nearly as many as her master, who would crush that Weasley woman like a giant would a cockroach.
The fight gets fierce; she is not as helpless as she looks, this Molly Weasley, whose son is now lying dead in the halls of this damned school, maybe even in pieces, left unprotected-
The exhilaration sears through her, leaves through her lips like a wind, and her lips mouth the words-
"Avada-"
But the spell isn't even out of her mouth and then green surrounds her, the Weasley's mouth moving, and Bellatrix catches a single glance of her master, fighting, the man she's always loved-
And then there is nothing, just her empty shell as the broken pieces of her soul vanish.