keeping in mind, that David hasn't fucked,
Oh, here you are wrong. In her perspective, he has fucked. I mean, come on. If you have three unrelated people saying your girlfriend furcked someone, see pictures of (almost) it, smell perfume for a while, and finally find a condome. Would you really give him the benefit of doubt? I would never.
So from her perspective, it's a way to even things out, so what's the point of moralizing, or saying I want a divorce
I don't think she has a clear perspective. She is hurt, she does not know what to do. She is not fucking around as a fixed mechanic of getting even. There might be several motives that fight in her head. Divorce, cheating, a combination. This is no "oh, you hit me, so I hit you and we are even - let's watch a movie!" It is like "ouch, why did you hit me? Take that! Will you hit me again out of nowhere? I don't know if I want to be with you still."
let's remember the photos sent to Chris, too easy for her to justify everything, saying that David is to blame.
Im am not completely justifying her. As I said before, both did bad things, she possible even more than him. But I would not say I cannot understand her or find her very bad. But we also have to differentiate what path we chose for Anna. Did we let her send that nudes? Did we let him in the bathroom?
And yeah, that is the mechanic of the game: The more you let her do, the more she is overreacting or even bad herself. But from the minimal basics where you began (He "cheated" on her, she lets go of her inhibitions and starts to have sex with other man), I can not find significant bad on her.
we always tend to remember the first bad action, the subsequent ones that are a reaction, even if more bad than the first action, always go unnoticed, I consider Anna's summary bad actions more than even David's unique one
Oh, it it relevant who started it. If I go to you and hit you in the face unprovoked, it is fully ok, if you then hit me twice or even until I lay on the ground and cannot hurt you anymore. It would be wrong if you would kill me though.
Additionally, see my text above, depending on your choices for her, her bad-sum rises a lot, yes. She overreacts. But even that I can relativise a little because she was hurt at first.
yes, we can decide whether to make Anna do certain actions, but they always remain in the options, while for David, no
I don't get your point here. We do can make him truely try to cheat or stay true to her.