I worked on something like this for a client and got pretty good results with this model: https://civitai.com/models/6431?modelVersionId=23104

I spent a while looking for decent loras but eventually settled on this because there are just too many porn fine tunes on civitai and it would take a lifetime to test them all.

The product I built allows users to ask pretty much anything (it's a sort of sex chatbot that also sends photos) and the problem is when people start asking super weird stuff and you end up with girls with 4 feet.

Or maybe they like that and it's not a problem at all, who knows.