I think... It is hard to say...

On the one hand we are taught that 'no means no'.
On the other hand it seems that (as a matter of empirical fact) if people give out verbal messages that go one way ('no') and non-verbal messages that go another way ('yes') that people go with the non-verbal messages - ESPECIALLY when the non verbal messages involve them getting whatever it is that they want.

How messed up your friend will be about this will depend quite a lot on the narration that she accepts as the 'truth'. If she sees herself as a rape victim then I bet she is going to end up feeling hurt, used, indignant, angry etc etc etc. If she sees herself as being in an unfortunate circumstance where she wasn't able to unambiguously decide on and / or communicate what it is that she wanted then I bet she is going to end up feeling hurt, indignant etc BUT: It might be that she can use this to empower herself into how better to communicate in future...

Does she have a therapist to talk to about what happened?

I do worry... That people are a little too quick to interpret things as 'abuse' at considerable cost to people who are thus cast as 'victims'...

It might be that the guy... Is a little dissociative / not so good at seeing that she wasn't sure and thus respecting that uncertainty... Or it might be that he didn't care... How she ends up feeling about the situation will depend quite a lot on how she casts him... Was he an abuser or was he confused? Didn't he care or didn't he know? Hard to say... But the stories we tell ourself make up our lives... Hard to say...