I don't know the specifics of the situation but I know she's still alive and online somewhere, she just stopped doing porn.
One of the last images was also Luna & Sam casually watching Jcm2 getting raped by a guy that Jcm2 had previously drawn raping Luna, then another comic where they kill that guy by beating his head into a table edge and start fucking each other while MangaMaster is hiding in the closet masturbating. I feel like like this has to be related to some incident or something that led to them deciding to quit loudhouse+nsfw art but I didn't keep up with the artist themselves to actually know. My best guess though is she didn't like their use of rape or lesbians (Luna's bi but still) with men. I also saw that she made an edit of that SA image of Luna by JCM2 so that it was now consensual and with Luna instead of SA by a random fat guy.
I honestly wouldn't be surprised if she and the other artist got into an argument over it and she faced some form of large backlash causing her to leave, it's unfortunately happened several times before in the nsfw parts of the TLH fandom when someone doesn't approve of the porn/fetish someone else makes. They get harassed about it until they just disappear from online.