Yeah? But that storyline is already in the game.
So, if you just want a cheating storyline, you already have it. But that isn't an avenue to what some people here seem to want, which is a hyper-specific fetish to your best friend because his wife is somewhat attractive and doesn't think the MC's penis is magic. This goes back to what I said when I logged in this morning: you're at a Wendy's. If you want crab cakes, go to where they serve crab cakes.
And for the 'keep an open mind' crowd....no. Fantasizing scenarios in which the developer attends to your hyper-specific fetish even if it breaks their own work is not being open-minded. It's trolling at best, unemployed behavior at worst. You already have developers that will hand you that niche on a silver platter. Let them feed you.