Too bad. Was hoping for a guilty-but-loving-nympho-wife/reluctant-husband route. Looks like male MC has to either be 100% encouraging or has to act like an asshat or a cheater himself to get her to cheat. As far as slutty neighbor's suggestion to "coax" hub into it, that shared porn-watching scene near the end of chapter 1 just seems like a missed opportunity. Hub or wife could've both had the option to select a different sort of porno to see how the other would react, imo. I think the whole Nat-to-hub proposition during their chapter 1 sex scene after the first gym incident (or after Nat's convo with slutty neighbor, depending on your choices) was a little too direct and sudden and I just can't bring myself to select it. Plus it's a bit boring to be that upfront and it kind of kills the kink.
Some softer coaxing or "testing the waters" would be both more hot and more believable. Even if either pretended not to like the porn that one had selected, their body would betray them, telling their partner everything they needed to know in the form of some soaked panties or raised boxer shorts. From there, either could set up situations to carefully push their reluctant partner further, safe in knowing the kink appealed to the other, despite their resistance.
TBH, I thought the game was setting up for just that, based on the slutty neighbor's story of how she got her husband into it. Dropping a few hints here or there. Seeing how he'd react. Then hub comes home early to a rude awakening, the wife confident enough that hub's arousal would overtake any feelings of betrayal and that they can kick of that kinky new chapter in their marriage from there. Agreeing to it beforehand or doing it just because husband is an asshat or cheater just isn't as hot to me.
College boy seems like a downgrade from Nat's exercise partner, too. Would be nice for each MC to have the agency to select which sexual partners they do and don't want to screw before each sex scene, rather than being locked into it once they're already on a selected path.
Not enough time for a single dev to please everyone though.