Apparently, this dress wasn't even made until a couple of years AFTER the incident she is imagining took place. AND, it would make more sense to me that if he *really did* rape her that she would have gotten rid of it a long time ago so as not to be reminded of such a traumatic period in her life. Her (fabricated) story is full of inconsistencies.
So, no. He didn't rape her, molest her, or otherwise violate her.