Her father is now actually her mother who goes by Lux (Lucienne)! I need to redo my little lore thread I have on here.

A very abridged version of Lux and Lily is that Lux breeds her own children in order to use them to prolong her life (and for magical experimentation). It’s not the typical blood sacrifice thing they go through, but it does end in the deaths of all of her siblings. Lux fucked up with Lily. Lux is resistant to magical influence from outside sources, and wrongly believed she would be immune to the side effects of Lily's venom. After trying to use it to help herself sleep (just a drop in her whisky every night), after a few years of it overriding her mind, she found herself at the mercy of becoming a thrall to a 7 year old succubus who hasn’t gone through puberty. And it all goes downhill from there.

Their relationship is wild bc if they were not mother and daughter they would be perfect lovers. Lux dotes on Lily, which makes it almost impossible for Lily to break away from her when she finds Lux’s grimoire detailing everything Lux ever did to her siblings. Lily is so defensive of her and Lux’s relationship, even though later in life she knows she was being raped and molested, and rarely ever opens up about it. Rick knows a little bit. The only person who she ever really speaks to about it is, surprisingly, Rita.