ATLA Zhao captures Zukko and Sokka, Zukko/Sokka
I can't find this old ATLA fan fic where Zhao captured Zuko and Sokka. He rapes Zuko before a crewman, one of the 41 Division, helps Zuko escape. Zuko and Sokka end up escaping together. There is a large focus on mental hurt comfort due to Zuko's rape and Sokka witnessing his mother get assaulted before the fire nation soldier killed her. I'm pretty sure it was complete.