Here is one:

Saving You, Saving Me (http://virtualpersonal.livejournal.com/264034.html) by virtualpersonal
Summary: The first time Dean lays eyes on the merman imprisoned and on display in an aquarium at a seedy night club, he can't help being drawn to him. Though they can't communicate, a bond is formed between them and he finds it harder and harder to leave Sam in the hands of the merciless bastards using him.

This story is Wincest.

Well, spn_littlebro has a prompting theme (http://spn-littlebro.livejournal.com/11919.html) that allows you to leave prompts whenever you want, and the new community write_on69 is for posting and accepting J2 and Wincest fic challenges.

Thanks :)