Ok, I have an idea.
Let's list what we like/don't like to see in any game involving sharing, hot wiving, cucking, femdom etc. For me, the impetus is always important. What drives the couple to experiment, or one of the partners to try something else/cheat etc. I know I'm being vague, it's just the whole niche is quite complex and expansive.
Like, for instance, the idea of a village where it's customary for the women to cater to the needs of esteemed guests would always include a desirable wife.
For me, that would be hot, yet so would a wife choosing to entertain a guest, by her own choice or maybe the husband wanting to get a buzz out of watching.
What I tend to see in many of these games is the slow burn build up then becoming a body count.
The wife who once wasn't sure, deciding she can now only orgasm when her pussy wall's stretched by some Chad.
My personal opinion.
Female protag experiences a new life of depravity caused by husband messing up financially. HOT
Female protag shared by a husband who realises seeing his wife groped/fucked both angers and arouses him. HOT.
Female protag becoming a hot wife after the hubby suggests it, then going thru the card with every guy she meets. MEH.
Also, I don't feel as emotionally invested in new couples, as much as I do a couple who've been together for a few years and
are romantically inseparable.
My own personal (body count) in real life always tended to be girls whose boyfriends were out with their mates, also fucking other girls.
So it doesn't give me the same buzz as a wife who loves her husband, but then gets fucked so good by another guy, she feels like she's never had real sex before.
A guy stumbling across the possibility of his wife cheating thru phone messages etc is HOT.
I never understood the whole phone text VN route but it's starting to appeal to me.
But it has to be subtle and believable.
For me, the problem with fantasy is, for me to establish an emotional connection with it, it as to be almost real.
I've noticed that those who want to get their rocks off quick, are perhaps flicking thru games/VN's which are not suited to them.
That's my ¢5