Honestly? Pretty much most of the 3D games with the harem tag.
My Legacy is a random example that came to my mind right now but as I said, a lot of games with the harem, incest and cheating tag have the storyline route of the unsatisfied wife that you can eventually steal, I know you must want good recommendations but there are so many western games with this type of mini-plot that listing them all would be kind of pointless. There is also the point of if you want to see the frustrated husband lose his mind after his wife is stolen since there are games that don't really show that part and ignore the husband completely, there are a lot of specifics on this type of stuff.