so why have mc know about wife cheating? why have wife cheat at all if your not going to do anything with it?
It's been years since i played it, so my memory is dodgy. But the game is complete.
Everything you do and find out adds up to different endings and a few extra scenes. I had to follow a walkthrough to reach the ending i liked with all the hidden stuff in it (and don't ask for one, i forgot where i found the game - it was a site that collected many other like it -adultinteractivenovels or AIO or something).
Finding out about the wife's adventures along with some other choices and stuff opens up a swingers ending and possibly a working harem type where you get multiple women pregnant, but i may be remembering this last part wrong.
Anyway, there's quite a few endings as i recall... happy marriage, divorce, prison, cheating on both sides, office harem, the babysitter, the sister and swingers. Many choices and things you find (the car, the house) determine how far you go and if something doesn't seem to work, then you're missing an item or a revelation or a choice.
Best if you can find a walkthrough. Some details are easy to miss.