So a young girl (in your words, thirteen or younger) who has had sex must remain with the man she had sex with? Even if the only reason a girl that young has had sex is because she was raped?

Wow. That's really twisted.

I also note that your precious commandments do not forbid rape (and don't give me the adultery crap again; it's irrelevant unless you erroneously assume that every woman ever born has had sex at birth).

You are the one who has got every thing twisted.
Your assumptions are incorrect—get the facts right before you jump to conclusions!!

Rape is punishable by death—so if a thirteen year old girl or younger is raped—the rapist must die—so when the rapist is put to death—the girl can marry some one of her choice.
While the rapist is alive the girl will be committing adultery.