Totally agree. Broadly speaking, there are two kinds of NTS: hotwifing and cuckolding. The first three/four chapters of the game clearly seem to set up a hotwifing game, the way MC and Vi's relationship is portrayed--ie everything is swell between them, but for whatever reason (here, health-related for MC, plus a kink that he didn't know he had), they decide to experiment with giving the lady some/total freedom in her sexual life, but their relationship remains loving and wholesome (think Netorase Phone).
But chapters 5&6 abruptly sends their life down the cuckolding path, which feels jarring, tbh. It's perfectly fine if that was the plan (although I personally like hotwifing way more, but that's just me), but it feels like this took a much-too-sudden turn, and the cuckolding should probably have been introduced more gradually (here, it almost feels like MC has already been kicked out of the relationship with Vi and is just here so she can belittle him while she moves on to "better lovers/real men", which didn't feel like the tone of the game at the start).
(Also, James having MC beg is probably a big no-no for several/many players, and in a hotwifing setting, he would probably already have been kicked out by both MC *and especially* Vi for the way he behaved.)