Netorase is a bit lazy and takes some of the drama away. It also focuses more on the protagonist perspective being pathetic(hetare) rather than just unfortunate. Personally my favorite part of NTR is the mystery perspective given when a heroine cheats discreetly and it appears in many ways in varying magnitudes as she gets more and more into it- early her personality will alter slightly, maybe she will seem shy or hesitant when talking to the protagonist because she has so much on her mind- later changes in her outfit, maybe stains, tattoos, piercings, visibly hidden things that maybe the audience playing will notice but the protagonist will not.
But the imagination works better for NTR than straight up showing the scene- for me. Netorase is as far from this as possible as not only is there no mystery- but both sides are actively enjoying it and the dramatic appeal and first reveal are all ruined this way. Might as well get into 3P with contrasting sizes and barely touch on the genre at all depending on how Netorase is handled. So hopefully there is enough to enjoy without the Netorase happening.. This being done in koikatu works really well and the heroine design is very interesting imo-(my personal favorite type is shorthair athletic types for NTR- but your heroine design fits the wife feel so perfectly- as it should.)
Anyway- first thing is first- hope it one day actually reaches a finished state and gets released. The main curse of western NTR is getting stuck somewhere in a 0.4 version and being forgotten about.
I think it is perfectly possible to maintain a heavy drama with netorase content if the wife "gets out" of her husband's control and exceeds the "healthy" limit on marriage.
This could be constructed in many different ways. Something like: She gets more sexual pleasure from other men, the MC realizes this and arouses insecurity (although he likes it); she would be dazzled by a freedom she never had; she would feel at ease as being the most desired woman in the city, etc.
In all circumstances, the drama would be quite heavy because the situation would escape the control of the MC, who would be insecure, but in a consented way most of the time. In the short term, she would remain faithful and dedicated to her husband. The impasse, in fact, would be more like: She doubting marriage at a late stage of the game, in favor of a life surrendered to lust