A significantly more improved model for this character has been made by NeedMyMommy by my request:

Vivianna from a MnF game for JohnyJim - V1 | Stable Diffusion LoRA | Civitai
Go check it out, it's great!

Very rough model; don't expect superb results.

Character model for the MnF character Vivianna, from a lesser known and cared about MnF game, Stepmom's Revenge 1 & 2. Not an excellent model as I am not versed in LoRA creation, so don't expect great results. I'll possibly learn more about how to update this model and improve it for better results.

Let me know if you get anything of interest.