Family Woman
Lust was a family woman.
The one daughter out of six other siblings, and the oldest next to Pride, she was fiercely devoted to her one parent. She had no mother, only a father. Father was enough, and she would do anything for him- he was the reason for her existence.
As an older sister, Lust had some amount of power over the others. Greed was an exception, but not even Father could keep him from running off on his own, that fool. And as for Gluttony, the youngest next to Wrath, she might as well have been his mother for the way he looked up to her.
But Lust knew, she could never be a mother herself. Not physically. This naturally left her questioning her femininity at times- was she barren? No, she simply wasn't human. Her female parts were merely for seduction, nothing more.
She had no lover. There were dozens of pretend ones over the past hundreds of years, all of them in the grave by now, most by her own hand. There were still stories of the military officer found stabbed to death shortly after taking up a mistress, or of a succubus in the night, coercing out confidential information through shouts and moans.
All of it for Father. Everything for Father. The only man in her life.
So it wasn't bad, really, to die in such a way. Fighting to the last, passionate flames engulfing her, by the hand of one such man, with such strong eyes. Not a father, not a brother, not a lover, but an enemy. A man that could withstand her lethal charm.
Not bad at all.