She wasn't 13 yet?

When Hélène is telling Pierre about her "encounter" with his father, the whole story is fantasy - the horse, the wild beasts, being one with nature. She tells him "I was 13 and full of rage." A minute later she says "I wasn't 13 yet", but almost immediately she says "we had been married for 5 years." It seems to me that all she's doing is backdating some rough sex she had with her husband to a fantasy that she had, or maybe acted out, when she was much younger. I haven't read the Bataille book, but the idea that she became a hedonist because she was brutally raped at 12, and on top of that she married her rapist and lived with him until his death, seems far-fetched to me.