I hate the "took advantage" language she's using, which is deflecting her own culpability. It's not like she was drunk beyond the point of legal consent or anything like that.

The flip side to that is that women do sometimes go along with things that they're not super in to because, in the moment, it feels like the best course of action. Saying no to a man is fraught and dangerous. If you talk to women about their (usually early) sexual experiences you'll hear a lot of stories like this, "I didn't say no, I don't really know why, I wasn't into it, I just sort of froze." And they're not calling it rape or anything just sort of sex they never affirmatively consented to and didn't feel good about even as it was happening. That is absolutely a thing that happens.

Is that what's going on here?

It's really hard to tell. You're going to have to use your judgement and knowledge of her. Most of your responses will tell you that there's zero ambiguity here, but there is some.