Your wife cheats on you, and you have a dream a couple of times of finding her fucking a guy, as to if you kept fucking her after that or not is another thing, I guess depending on your opinion it can go either way.
Personally, as a hater of NTR, I take it as she fucked him and we never touched her again, but as I said, unless I am forgetting something there is no mention of staying with her.
Although you also did date a girl, you get with another girl, and then go back to the first girl and marry her, even though she is pregnant by another guy, although you see no sex.