Ok, the site I found is
http://brothellife.com/ run by prostitute Rachel Varga, who personally approves every new registration. Apparently it is the only independent LPIN (Legal Prostitution in Nevada) forum, compared to a few brothels having their own forums. I had to make an account to see the pics of Roxy in her advertisement thread. All the pics are in the spoiler. No nudes.
Not sure what is attracting Russ to her or how he found her. She doesn't have a model's body or a toothy smile. She doesn't seem like his normal type. Based on posts on the Brothel Life forum, it seems like she switches between Dovetail and Mustang Ranch, though she doesn't have a profile page on the Mustang Ranch site. She used too, but it now 404's so I'm not sure what that means as far as her working there in the future. I believe at one point there was a video of her up on the Mustang site, probably in the Clips section where people can pay for videos, as I saw someone mention it. Roxy is always described as a "COY" so maybe that makes Russ think she'll kiss him a way that helps with his disability.
I looked through the relatively small memberlist for Brothel Life (only 275 members, including my new account) and didn't see anything that jumps out as being Russ, but have included screenshots of the list to have it peer reviewed by you fine people.
I was trying to wait until I got an account on the Mustang Ranch forum so I could look through it (and the members list) before posting, but it's been days now waiting on the account to be approved. If it ever does, I'll post if I find anything.