rape = no consent. The same as blackmail, mind control, slavery and the other half of the dark side.
If you still can't find any place to post it, try
www.asstr.org
It is a story site that follows old school rules on literature. Basically, everything goes as long as you include 'This story has no relations to people alive or dead.' Though it's not necessary as they do not censor anything. Whatever you write is your own responsibility. That also means they do not stand up for you for whatever reason.
There have been moves by puritans to close it down, but they all failed. Because the site did not break any laws even with its contents. Yes, there is actually no law that forbids erotic stories between minors. There is also no law that forbids sex involving minors in literature. All the restrictions were self-imposed by the websites. The only jurisdiction that does impose a rule on it is in Canada, where literature involving sex between a minor and a person 5 years older is unacceptable, but sex between two minors is not a problem.
ASSTR, Assorted Sex Stories Text Repository, does not self-impose any censorship on themselves. Literature is not the same as real life. The law understands that, despite what the puritans want you to believe. This has been the argument that ASSTR has been using for decades.
The only downside to ASSTR is it will be very unlikely that you will get any feedback because the readers will need to open their emails and send you an email.
Or you can try
storiesonline.net . It is a story site that also do not censor itself. You can write whatever you want there. The only problem is feedbacks are rarely given.
Literotica is useless. They self-censor themselves. Ai-chan once posted a story there but it was deleted for 'religious blasphemy'. Yeah, sounds like something the mod made up, right?