I do have plans do some kind of in-game walkthrough at some point. But for now, it's really complicated and depends on your choices. This game has a lot of branches to paths. See for yourself this is a quick look at my flowchart.
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When you get to the second beach party:
approach wife -> You stay I'll go
At this point your wife's corruption must be at least 5 otherwise you get shunted a different route. You need to agree to every thing at the spa which will get her there.
If you did it right she'll ask you if you like her talking to other men. Select either Yes or Do what you think.
If you select yes then she will ask you two more questions which you must answer yes and then finally her last question you answer "Do It."
If you went the "Do what you think" route you answer yes then Do it to her next questions