EDIT: If you haven't updated the sins count, why are you playing this game!? For the sex scenes between Alice and the MC?... To each his own kink, I guess.
Fans of true NTR will play against the NTR as hard as they can - including remaining faithful to the LI - in order to get the strongest possible NTR kick when (rather than
if , hopefully) the LI's betrayal is revealed.
If the MC was already cheating on the LI left and right or treating her like shit then her cheating on him isn't as much of a betrayal. Rather it's evening things out, a lesser kick.
The ideal NTR MC -the one who will suffer the most from it- is a nice guy who deeply loves his wife and would never intentionally jeopardize it. Some games understand this to the point where explicitly choosing to remain faithful/avoiding the harem path forcefully sets you on the path of unavoidable NTR.
i hope the dev gives us a choice to snap Alice out of her hypocritical self righteous anger next update.
If she keeps intentionally and openly hurting the MC/her husband (in the latest stripclub scene he even says she seems to be enjoying watching him squirm, enjoying causing him grief), after finding out he's innocent, that he's been true to her all along, then there won't be as much of a reason left to care for her nor whether or not she eventually cheats on him (in the very, very unlikely chance that it's all been smoke and mirrors so far on the "loyal" path) as he'd just be better off dumping her then.
MC would have to start jumping through hoops to justify her behavior to himself (way more than he does with his current obliviousness) to assume something like she's now blaming herself for believing the lie and irrationally lashing out against him because she can't bear her own guilt or something - rather than seeing her as a slut who's just jumping from one excuse to the next to justify her whoring out and keep blaming him for it to control him.