That's exactly how plot twists work

The audience is tricked into an easy path, then suddenly the unexpected occurs. EvaKiss was prompt in correcting, in one of the comments on her Patreon page, about the theory of having Axel as the guy which Gillian had an affair with:
"I'm gonna kill that red herring now. Ian's ex-gf didn't cheat on him with Axel. The obvious connection between them is Lena, but that's not the only connection they share... You'll find out more in chapter 3!"
But she didn't do the same with Jeremy. What if the asshole boyfriend is actually Axel?