I never do ship fanart, let alone make kids of a ship, but I was compelled. The girl is Pomme, and Ignace is the boy. They're both super cute but can be little hellions, and some time straight up creepy a la The Shining (it's a hotel so it's perfect)
I don't know how the twins came to be, like did they just pop out of thin air due to magic, or what anything is possible in hell. The twins dont have antlers. Instead, they sprout horns and claws like Lucifer and Charlie. They got their cheek markings, too, but they got some melanin from Alastor. They have shadow magic, too, but usually get around by climbing the ceiling like the hellspawn they are. Their heads can swivel 360° like Alastor, which freaked Charlie out the 1st time it happened, thinking she broke her baby sibling. Charlie was sobbing while holding the baby away from her and sleep deprived Alastor, who knew they could do that just fell into a fit of manic laughter. Lucifer then walked into the demented scene holding Pomme and walked right the fuck back out.
Alastor was freaked out at first, but they look so much like his mom that he couldn't help but fall in love. I see Alastor as the more "mom" of the pair since he actually had a mom, can cook, seems to have a more 'get things done' type of personality. While Lucifer is getting better at being a dad. Hes terrified hes going to let them down like he feels he did to Charlie. But when your partner(could be platonic could be romantic although I a demiromantic personally lean towards romantic after getting to know each other and bonding) doesn't up and leave, support makes all the difference. I also feel like they're first words were calling Alastor Mama because Lucifer had been training them as revenge for the whole "It's a little funny, you could almost call me dad" line he'd be like "nuh uh not even these ones are going to"
Alastor and Lucifer argue a lot about their clothes. Alasto will not have his children dressed like members of a circus. Lucifer doesn't want them dressed like little old people. Youd think since theres two they could compromise but the one thing they wordlessly agree on is that theyre cutest when they match. Charlie or Nifty usually step in the middle of the argument and dress them during the argument and take them to the kitchen. They're low key aware of this but still argue because fighting is low key a love language.
Other than their parents, their favorite people are Charlie(sister), Rosie(auntie), and Nifty(pseudo sister.) They like cuddling with Angel and Husk, for naps because they're soft, but for awake time, absolutely no respect for those two! It's like the scene with Jack Jack and the babysitter in the Incredibles. They don't like Vaggie at first since Alastor has a bit of a tiff with her, and she takes Charlie away from them. She eventually wins them over. They like her singing and that she talks to them like big people(she's not capable of baby talk.) They hate the Vox and Val much to Alastor and Angel Dusts delight. They're awed by Zestiel, though no one is quite sure why. Zestiel is greatly amused by this.