Putting aside the eccentricities of the paths in the previous version of the game for the sake of argument, the player's choices do affect Anne's actions and how far she's willing to go. I've been saying for a while that the sort of core philosophy of the game was slowly but inexorably revealed to be "be careful what you wish for" rather than the uncomplicated sexual romp most players (including me) initially took it to be.
The story begins with the MC pushing Anne pretty hard and not always showing much empathy, or even concern, for what she wants. When she resists or states her own contradictory preferences — and on occasion she does — he outright ignores her. He can (if the player chooses) also repeatedly cheat on her, and despite her making it clear on multiple occasions that she's not particularly okay with this — especially when he does it without her knowledge or consent — he never changes. It's completely rational for Anne to conclude that she should look out for her own interests and take control of her sexual exploits, and it's also completely understandable if her willingness to view him as an equal partner in those exploits erodes as a result.
A properly constructed path system in a game that offers choices between swinging, hotwifing, and cheating would only have this occur on routes where the MC has failed to consider her feelings, cheated on her, encouraged her to cheat on him, or otherwise given her reasons to lose respect for him. (With the major caveat that
@Mircom3D may have a different idea about how the game's going to end, no matter what path you're on.) Right now (in the original game), Anne will eventually cheat no matter
what choices the player makes. Just how
much she cheats, and with who — and just how much the MC cheats — remains up to the player.