I believe she consented when she agreed to a price and appeared at the man’s home ready to engage in sex. She made herself a commodity to be bought and sold.
She consented to a GANG RAPE with a gun held to her head?
You must have read a different story.
Not in the law she didn't. By way of analogy, she couldn't even make herself a commodity for purposes of chattel slavery. The law does not recognize the human entity as chattel. (Except, unfortunately, in the case of embryonic children, who can be bought, sold, donated, or destroyed at will.)
More importantly, the law doesn't look at her personal spiritual purity or psychosocial wholesomeness. It looks at consent. It holds that sexual intercourse without specific and explicit consent in each instance is rape.
Equal justice under law. It's an American thing.