If you're looking for similar as in swinging, wife sharing, cuckold, cheating, NTR, or some variation that sort of thing (before someone is OMG swinging is not NTR blah blah, yes I understand, but the question is kind of vague so these are games where the wife and maybe the MC are doing some sex stuff with other people as a primary component of the game. But disregarding the games where it's a female MC just running around cheating on her man who is really a minor character like Anna's Exciting Affection, Elena's Life, and the like):
The Adventurous Couple is great and one of the best ones out there in my opinion.
Cuck Simulator is fun as well, even if the art is a bit weird.
Angelica's Temptation was good, though it's abandoned for the time being
but has a fair amount of content and few paths that can be taken for a few different playthroughs.
Happy Marriage has a pretty good start, even if a bit frustrating with its game play mechanics.
Marina's Cuckolding Report is more of a straight VN and it's mainly just her cheating, with her husband's consent, but you don't have too much interactivity. Though it is interesting to get to the end where you can go back and see the scenes from her perspective and she how much she left out or straight up lied about.
I know I'm forgetting some but those are off top of my head.