That's very different from "the sex became nonconsensual retroactively". And I don't think it's uncommon for women brave the consequences of speaking out about sexual assault when they believe there's a pattern of behavior they can protect other women from.
Source? Seems to differ from: https://www.theguardian.com/media/2010/dec/17/julian-assange...
> "On a point of law, the Swedish Supreme Court has decided Ny can continue to obstruct on the vital issue of the SMS messages. This will now go to the European Court of Human Rights. What Ny fears is that the SMS messages will destroy her case against Assange. One of the messages makes clear that one of the women did not want any charges brought against Assange, "but the police were keen on getting a hold on him". She was "shocked" when they arrested him because she only "wanted him to take [an HIV] test". She "did not want to accuse JA of anything" and "it was the police who made up the charges". (In a witness statement, she is quoted as saying that she had been "railroaded by police and others around her".)
> Neither woman claimed she had been raped. Indeed, both have denied they were raped and one of them has since tweeted, "I have not been raped."
-from http://johnpilger.com/articles/assange-the-untold-story-of-a...
'Elisabeth Massi Fritz, who represents the woman who accused Mr. Assange of rape, issued a scathing response after the prosecutors abandoned the case. “A legal examination is very important for someone who has been raped, as is the possibility for redress,” she said. “In this case, there have been many turns and the wait has been very long. My client is shocked and no decision to shut the case down can get her to change her position that Assange raped her.”'