A liitle bit of info about how exactly is the ntr avoidable. You can straight up disable it at the start, but to me that feels like cheating (ironically). It is avoidable without disabling it, but it's difficult and probably won't work on a first playthrough. Also, if you let the wife decide she will cheat/share no matter the stats. So basically the only thing holding her faithful is you telling her no every single time, IF you have high enough stats. Fail a couple skill-checks and off she goes.
An example: My 2nd PT i passed every skill-check and went on a boat trip with Jamal and the wife, who i always name Indaya in NTR games, since it's a nice name and quite fitting it you translate it from Kinyarwanda... anyway, i had to tell Jamal no like 5 times but it was fine. My first playthrough i couldn't get enough points, Jamal kept antagonising me and ended up going on the boat trip with the wife but without the MC (don't know exactly how i skip most of the text), and they ended up NTR-ing as much as they possibly could, including belittleing the MC and such, even though they never shared even a single hand-hold and i had a lot more love points with her than Jamal. So yeah, you can do a faithful PT but it's hanging on a very fine thread. Just like this very fine thread above my comment ❤.