By the way - I have never seen a porn game, where we describe the man finding his sexual fulfillment and joy in fucking other women and at the same time making an effort as authors or viewers to claim that thereby his love for his wife /girlfriend is intensified or remaining untouched.
There are many erotic stories that do this well. Probably fewer VNs/games like this in the world to pull as examples, but one popular "mainstream" option is Deliverance (MC/wife). One promising game in development that I've been enjoying recently is Mastering The Pink Box - the relationship between MC and Devon seems like it will explore these themes. Things usually feel more natural when the sex fetishes are a background element to another main plot, but it can also work in these purely "slice of life" games, too. The slice of life stories are supposed to be immersive though, so readers aren't guided through a nice summarized plot with an intro, problem, climax, and ending with a moral lesson... here we're supposed to be taking a vacation into the life of a share enthusiast couple and just vibing with the day to day experience.
The love between MC and Laura in this story is baked in and already established, so relationship dynamics won't be a theme the author's exploring and making commentary on outside of
these two are kinky and having fun, let's see what they get up to! I think some of the trouble Stag runs into is that the phone/messaging system here
is too immersive and the game can start to feel off-putting when a reader feels forced to agree to/commend Laura for/ask for things that don't fit their personal kink preferences...
kink dissonance.