I think most of these Vicky theories are wishful thinking at best. Developers went on record that present Victoria will not be involved sexually at all, and that means no incest. And I think that's for the best, as Victoria's story and her "career's" effect on Edwin is too well written and complex to throw away for a gratuitous incest plotline, when the genre is already overstaturated with "porn without plot" type games. It also doesn't help that we have 5 main girls already, and Vicky is firmly planted as a minor character in the pecking order. We know who the story revolves around.
As for the theory that Ian is fucking Vicky, or will fuck her sometimes in the future, it has pretty much been tanked during the last update, considering their interaction was very platonic. Also, considering we're nearing the second half of the game, I doubt it will happen considering no seeds has been planted for it to happen, especially in such short timespan.
I'm much more curious about Vicky's past relation to the Club, or rather it's less formal predecessor which was just a glorified porn/prostitution ring, rather than the macabre spectacle the Carnation Club is today due to Kat's money. I think it's pretty obvious that August used to be her producer, maybe he even used to pimp her out to wealthy clients like Dr Chuck, which would explain her dislike for Chuck that she refused to elaborate on to Edwin, or her surprised and aloof reaction to Edwin mentioning August, and Vicky's clumsy attempt to get Ian to divulge information about August and co by playing dumb. There's no reason the dev would leave this little plot thread in if it wasn't relevant somehow. I just wonder if it'll play any part in the endgame, or if Edwin will find out the truth at all.
I'm also interested in the potential fallout if Vicky finds out about Edwin's job, or his knowledge of her porn career. Despite her being a good mother and doing her best with what she had, she has inadvertently caused massive damage to Edwin, considering he's a loner shut in with mommy issues that treats his only "friend" like crap and recreationally watches his mom's cinematic exploits with dozens of gentlemen. I think people on here underestimate just how fucked up Edwin is.
To me, there's always been this unsettling darkness bubbling under Edwin's "mediocre nice guy" exterior, and his inner monologues give us hints just how poorly adjusted and antisocial he is. He's definitely dissasociated to some degree, and Kat's definitely sensed that Edwin is far more monstrous than he appears, definitely much more than Ian, who I think is just very misguided by Chuck, and even his own parents. I'm not denying that Ian is a scumbag, but he seems pretty introspective about his own issues, while I get the sense that Edwin is not even conciously aware of his own mommy issues, and how much repressed anger he has over it. The only time Edwin truly seems alive is when he's angry or when he's hummiliating or harming the girls. He just seems like he's going through the motions the rest of the time.
Maybe I'm just bored at work and overthinking this