She is and was an adult woman. Can I not expect her to know, in the typical case, whether she does or does not consent to sex?Women often feel confused about the detail of their own consent after date rape or acquaintance rape. This is true in part because most people imagine rape is some kind of violent assault by a total stranger conking them on the head and dragging them into an alleyway.
They don't expect to have to ask themselves how much alcohol is too much alcohol for me to have been consenting? Did he or did he not intentionally get me drunk for the purpose of impairing my judgement?
Did he or did he not lie to me and maneuver me into staying alone with him in an Airbnb in the name of "helping" me? Since he did, in fact, help me get to this conference, does that somehow negate his bad actions or something?
Etc.
People expect rape to be some obvious, easily identifiable crime and it's often not.
I once saw a question posted to the internet where the woman was like "I know I need to drink less..." when a colleague plied her with alcohol until she couldn't stand up anymore and then took her to his hotel room. She felt she had been unfaithful to her boyfriend and internet strangers had to tell her "Girl, you were raped, not unfaithful."
Hopefully women are clearer than that "in the typical case." Presumably, "the typical case" isn't actually rape.
But what she described is very normal for anyone who has been treated abusively not by some random stranger at gun point but by someone insinuating themselves into their lives and claiming to be a friend who just wants to help, etc. Even without the detail of sex, people often agonize over what they did wrong, whether or not they "owe" someone who intentionally shafted them etc when they were supposed to be friends, business partners, etc.
People who know ahead of time how this works are much less vulnerable to such predators and can still get shafted. Predators typically seek to place themselves in a position of trust and to operate under a cloak of plausible deniability. They actively seek to obfuscate their real intentions and then act all hurt if you question their intentions, etc.
It's very hard to sort something like that out.