I'm shamefully into Darth Tantrum in Leia's slave getup, and also Kylo Ren being fucked by people who hate him, so. I'm thinking something goes wrong, Ren makes a mistake and gets captured by Hutt slavers, drugged into a lustful complacency, and Rey is somehow magically stumbles across the auction and is compelled to use this opportunity to bring him to justice. And maybe screw his brains out.

++ Rey never touches him directly, but fucks and manhandles Kylo with the Force.