I'm back to practicing drawing again bc of how much I've been thinking about the jeweler and designer au and it's insaaaane how badly my skills degraded from years of disuse, uugh
Anyways. Charlie when she's old enough to choose asks to have her ears pierced like daddy, and Lucifer agrees and holds her hand while it's happening, and even gets a third set of lobe piercings in solidarity with her. Then they go to Alastor's to get her a pair of pink opal and rose gold stud earrings. Lucifer gets white opal on silver.
Lucifer loses his mind a little bit when he learns that Alastor is actually very good with Charlie and that Charlie likes Alastor. Like, Alastor gets down to her level to talk to her directly because "this purchase is for Charlie after all, she should get a say in what she wants to wear. And it's not like the price is a dealbreaker for you, now, is it Mr. King?" Charlie adores this sort of attention, the respect towards her personal autonomy and her preferences. And Alastor remains consistent with it throughout the entirety of his and Charlie's interactions.
(Is this me mildly venting about how I think adults forget that children are humans with thoughts and feelings and personal preferences and shouldn't be treated like they're incapable of expressing themselves in any capacity without adult intervention or control?? Yup.)
Lucifer is fucking GONE on Alastor. It's been at least two full years of slowburn between them at this point, and yet Lucifer just keeps falling harder and harder as time goes on while still technically doing nothing about it.
Alastor on the other hand has actually not grown more obsessed over time, because he reached his maximum level of possessiveness towards Lucifer very early on with how overjoyed he was to have someone as his canvas. Alastor's obsession is also categorically different from Lucifer's in that it's not even really romantic or sexual in nature. It really has to do with him seeing Lucifer as the perfect model for his finest work. However the line is so thin that honestly all it would take for Alastor to seriously consider Lucifer as a potential significant other would just be Lucifer asking him out.
The ball will forever be in Lucifer's court, in other words. It won't happen unless he makes the first step. And he keeps chickening out from making the first step.
This interaction between Alastor and Charlie would be the turning point, though. Lucifer starts seriously thinking about his future with Alastor (which is actually kind of creepy as they aren't even dating yet, but he's already been a bit of a creep considering the thousands of sketches of Alastor in lingerie with the excuse of it being for professional purposes). He starts thinking about growing old together, about having silly domestic disputes, about buying a house together, about going on grocery trips together with Charlie, etc. He starts to turn away from his usual schemes of trying to get close to Alastor through professional means, like fashion collaborations and commissions, and starts thinking about how to actually breach the subject of going on a date.