julorean.livejournal.comI remember reading this a few months ago, it was fairly long. Kirk is having some trouble with his Federation citizenship because he was born in space, and if he can't fix it he can't be Captain. Spock volunteers to marry him. Slowly, they come to love each other. I remember there was one scene with Pike was on board to make sure they weren't faking it and he's talking to Spock. Spock realizes Kirk was injured through a tentative bond they made, and runs off to be with Jim. Pike had thought they might be faking, but that convinces him they aren't. They bond fully by the end.
Thanks for everyone's help!
Fic has been found, and right quick too!