The husband's fetish is his wife fucking other guys, but he has plenty of side opportunities of his own, the vast majority of which are cheating. Anne also cheats, though how much she does depends on how you play the game. There's also a little bit of swinging and a very little bit of cuckqueaning.
I wouldn't say there's really a "goal" as such, but there's no reason to play this game if you're not up for seeing Anne take as many dicks in her as possible, no matter what else you let the husband get up to. After a certain point, the game punishes you for trying to dial it back.
The player pretty much has to choose to be humiliated, and even then there are alternatives. But this isn't really a humiliation game; the husband almost always gets off on what Anne's doing.
No. After a certain point, Anne's gonna be with other guys whether or not her husband likes it. I suppose some people might consider that femdom, but I don't. I don't think anything in this game will satisfy someone with a femdom fetish.