...Now, obviously, if one comes down hard on the "their relationship is immoral" side of the former, then this hypothetical new relationship would, indeed, be just be more-of-the-same-but-worse. I would respect that opinion: There is a good argument for it, as previously mentioned.
Though I don't think I would personally be reading this if *I* felt strictly that way about their existing budding relationship.
Of course, I may yet just end up terribly disappointed with this series. I haven't even read the newest couple chapters yet. And adaptations in particular often lose (or soften) some of their red flags and warning signs from the original works, if the adapting artist cleans things up a bit in tone.