I have been searching for hours and I cannot find this fic to save my life!!
What I remember is that Brian is a captian of a space ship and his crew are the entire canon gang. They take different "jobs" to pay their expenses.
They land on a planet after one of their job and I believe Justin is like a prince or something who is supposed to be married but brian sleeps with him and is forced to marry him afterward (I might be thinking of a different fic for the last part). Either way Justin ends up on the ship.

It is a long fic and brian and justin can communicate telepathically and Justin subconsciously rapes Brian telepathically. Justin gets stranded on a planet and is tortured. THe gang tries to save him. This is all I can remember! I hope someone can help me!

FOUND!! "Give Me Liberty" by Elyxer? (Thank you bluecat731!)