Then, looking at the walkthrough yet again, I think my fuck-up might have been taking some of the choices that put me on the cuck route.
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Looks like if you have a cuck score of 2+ you don't get to confront her about cheating at all, which makes sense I suppose. Doing a ctrl+F for "cuck" gives 150 matches in this document and I just don't think I have it in me to carefully monitor my cuck score throughout another legit playthrough. It takes enough mental energy minmaxing my cuck score in real life.
Respect to the dev for juggling hundreds of variables though. This really can't be an easy game to develop.