Not sure if it's Sophie, I don't think we've seen her face, but it's definitely not Kam. Could be another one of his girls I know there's at least one more regular he has who's pretty good at throating, but she's not blonde, so maybe this is someone else.
Neither Kam nor Sophie have socials AFAIK. Kam used to have Instagram but it's either been deleted or she changed the name and it's hidden.
Apparently there was some malicious way to use bookmarks so they've been disabled. Idk if it's permanent