It's a slap in the face.
That his daughter would be apparently won over by the compelling falsities of Heaven. Would choose to espouse those unattainable standards and kowtow to the ones (one) who demand it else damnation.
Lucifer fumes, coiled over the palace balcony, looking but not really out over the apple garden that, right now, taunts him over his past.
He only sought knowledge, answers (temptation); as did his lovely Lilith.
He doesn't recollect Charlie asking why the Exterminations occur; what really constitutes sin, what happened when Lucifer fell (was pushed); how Heaven really works.
For all that's apparent she's taken the lowest-hanging apple; accepted the victor's account without scrutiny.
Is this his punishment? Lucifer knows Heaven wants an 'antichrist' to rally against, and he would never willingly mold his child for that ridiculous role – but did he shelter Charlie; keep too much from her for too long?
A/N:
This would take place pre-pilot, after Charlie & Lucifer have a heated argument over her redemption project.
I've tried to portray Lucifer as harbouring (and understandably so) a great deal of resentment against Heaven, while also clearly trying to excuse himself. Caring for his daughter but struggling to communicate with her. Again; grey & grey morality.
Leaning into the self-fulfilling prophecy trope a bit at the end – that Lucifer raised and perhaps sheltered Charlie trying to avoid making her into an 'antichrist', to protect her and to stave off the end-times. Yet her emotional reaction to the Exterminations and the suffering in Hell could push her over the edge a la Anakin Skywalker
(ooh now I need to do a villain!Charlie drabble)