I have played all the variations and she does seem fairly accepting of him bebopping as long as she's around
She also accepts Nicole (and even says that she was expecting it), is willing to leave the MC to do whatever he wants at the swingers' party, encourages him to have his own fun at the bar, and is at least conditionally accepting of whatever he does in Punta Cana. I'm not aware that she
ever tells him he can't sleep around as some (not you) keep insisting, only that he needs to be honest about it. Which he never, ever is until confronted.
The MC can cheat (and hide it/lie about it) far sooner in the story than Anne.
What got me mildly wound was all the nights she'd just go to sleep without any consideration for hubby.
It's somewhat upsetting if you expect their screwing around to be equitable, but that's something that players impose on the story and I think it's a misreading of the intent. To me this has always been about the MC's cuckolding fetish rather than a wish to expand their marriage to include other sexual partners in a balanced way. Evidence:
1) All the challenges for the "couple" are aimed at the wife. The husband's never once asked to do something.
2) On multiple occasions (at least four come to mind) the MC is offered the choice to participate or just watch. In one case (Dre) Anne makes it clear that she would've
preferred he watch. The swinger neighbors actually make this textually explicit; if he chooses to watch the wife says something like, "oh, you're one of
those." Whereas Anne is only faced with that choice once (the bar), and even then that choice comes alongside a different set of options in which she can ignore him and go have her own fun.
3) As I said above, the MC
always hides or lies about sex he's had without Anne present until she confronts him about it, though he's also offered plenty of opportunities to have sex about which she'll never know. That said, the player's choice to allow the MC's cheating doesn't affect Anne or their relationship at all, save for the one potentially game-ending moment in Punta Cana.
4) On the other hand, the MC isn't just fine with Anne having sex even if he's not around, he actively encourages it (and sometimes gets really pushy about it, to the point that he upsets her), as long as he gets to hear all about it later...something else he can be fairly pushy about, at least over the first half of the story. In other words, his true interest isn't in Anne's sexual satisfaction, it's about how
he gets off on it. He's using Anne's sexuality to feed his kink. Is there any point in the story where he takes the time to figure out how she feels about all this? I mean emotionally, not sexually.
5) Early in the game, when she's still resisting breaking certain boundaries, he's like a hyperactive and horny puppy trying to get her naked, to seduce bartenders, to bring men home with her. By the current point in the game he's practically indifferent, just assuming that a) she has sex whenever offered the opportunity, and b) she's going to tell him all about it later. He's treating her like a walking Fleshlight, like his own personal Pornhub. By this point the MC can (if the player chooses)
resist her attempts to tell him about her adventures, which of course greatly upsets Anne (and induces penalties in the code) because it makes it clear that they're really not in this together.
6) If the player chooses to push her into a sexual relationship with Martin he's even accepting of that, though he has several good reasons not to be (Emma, plus he's his
father). Note, though, that when he expresses hesitation and second thoughts Anne does something she's never done before: she does what
she wants. It's only when
she starts taking control of her sexuality that the MC balks. For instance, he's quite happy to send Ryan back to the apartment so they can fuck. He's not even slightly upset when they do, he's only upset that they hide it from him...and that's true whether or not he's been screwing his way around the diner, the beach, and the office.
7) As for the "no sex for you" nights, those are certainly evidence of selfishness...but
his, not hers. He expects her to slut it up all day and night for his own sexual jollies and then take care of his needs too? We (the players) see this differently because we know that the reason she's too tired some of those nights is because she's been cheating on him, but until Ryan's second visit he has no reason at all to suspect that she is. Furthermore, this is something that could be easily addressed with an actual conversation — "hey babe, all this wild stuff we're doing is really fun but I feel like we're losing touch with our own relationship" — that could, in a more logical game and depending on the actual status of their relationship, result in things getting better (or an argument followed by things getting worse). But they won't have that conversation. Not because they're incapable of it (even though they often talk to each other like twelve year old surfers), but because the husband has no interest in communicating their way through this. Because it's never been about spicing up their marriage. Maybe it was for Anne, at least up to the point she's able to cheat, but not for him. It's about feeding his fetish. And he's not going to tell her that like an adult human being in a functional marriage, he's just going to get whiny that she's not servicing his dick whenever he wants.
Now, as you and others have said a logical game would treat all of this differently. Either the MC or Anne denying the other sex at night would either have relationship consequences or
be a consequence of an already endangered relationship. (e.g. cheating Anne rolls over and falls asleep, whereas non-cheating Anne initiates sex; and the same would be true for a cheating vs. non-cheating MC). A logical game would treat
all instances of dishonest non-monogamy as damaging to the relationship. Every single time one of them has sex away from the other the player should be offered the opportunity to reveal it or lie about it and there should be consequences for both. Certain encounters should be more disruptive than others; for example, Anne having sex with Martin should
always do immense damage to their marriage — which it does, since that's the cheating trigger — and so should the MC having sex with Emma or Anne's mother.
But for better or worse that isn't this game.