I am inclined to disagree and believe that even if she willingly had sex with one or two (maybe the 14 year olds), she was raped by many more. In the same light, I'm not sure this was the appropriate place to bring the argument up considering how obvious it is people were going to attack anyone who made it.
Nonetheless, the above statement is not victim blaming. Victim blaming would have been, 'Those guys didn't rape her' or 'It's her fault for coming onto them'.
Not a single person has said that or implied it. On the other hand, those who have accused others of victim blaming do so under assumption that 11 year olds never have sex and that anyone who acknowledges the reality that this has happened in the past are 'victim blamers'. Maybe she had sex with one of the younger ones, he told some people and the rest of them took advantage and raped her.
None of us know the entire story, but it's such a perversion of people's arguments to say that in bringing up possibilities, anyone has blamed the victim.