I was recently looking through the list of all the characters in the game, and one thing that stood out to me even more than before was how almost every male character on Lena's path are taking pictures, either as professionals, amateurs or just by documenting sexual encounters. That also made me think about how their developing exhibitionist (Lena) and voyeur traits (Ian) are very much tied together with that picture taking (if you're following those routes, obviously).
Jeremy's part in this is pretty obvious. He seems to be documenting every sexual encounter and bragging shamelessly about it to Ian, and I bet he'll want to take pictures of Lena too, sooner or later. Even though he promised Lena not to tell Ian about what happened between them, I could definitely see him either failing at doing that, or ending up showing pictures of him and Lena to Ian by accident. E.g. Jeremy showing Ian pictures of a girl he's recently been with, and Ian then ending up scrolling one picture too far and suddenly seeing Lena.
We already know that Axel used to take pictures of him and Lena together, and that he's promised to take pictures of her soon. The story also seems more than ready for a sex scene between those two, so I wouldn't be surprised if the photo session ends up with Axel getting some new sexual pictures of him and Lena. With Axel's and Ian's possible fight over Lena, and seeing how possesive Axel is, I could see him simply showing those photos to Ian to humiliate him or just… assert dominance. Fragile masculinity and all that.
Seymour's role as photographer is not as clear yet, but he too definitely wants to posess Lena, and I could see him using any future more sexual photos of Lena in a similar way as Axel. At least in a scenario where Ian is standing between him and Lena, and particularly if both Lena and Ian are dependant on Seymour through their modelling and writing careers respectively.
Stan is also playing a part in making content for Lena's Stalkfap account, and he's important to Lena actually developing her exhibitionist trait. Billy also seems to have a role in the more shady parts of Lena's modelling path. Mike's been taking pictures of Lena as well, and even Ed's drawings in a way ties in with the theme. And if Ian is subscribing to Lena's Stalkfap, that's another way he can end up seeing Lena together with someone else.
I doubt that Ian, being in a relationship with Lena, will be forced to watch pictures of her with every guy in the game, or that we'll see any over the top cuckold scenarios like in GGGB. But I think the double protagonist gameplay, giving you the chance to mould both parts of the story, will be more interesting in scenarios where there's some kind of unbalanced power dynamics between the two. It's not about humiliating Ian either – his reaction could range from (and now I'm obviously exaggerating) resigning to sit in his room all day and jerk off to pictures of Lena and other guys, to going full amok and beating up Jeremy and Axel, swearing to bring down Seymour, and sleeping with all of Lena's friends as revenge.
