Spock is pretty much doomed the minute Jane realizes that the fatshirt is incredibly slutty, and also regulation.

"'Spock,' Jim breathes out, completely overwhelmed by the gesture—not quite believing that Spock knows him so well, that's he's already started researching, that he trusts Jim with a member of his own endangered species." When Jim gets it in his head to adopt an eight year old Vulcan, Spock presents a logical solution to the issue of Jim's humanity: marriage to a Vulcan citizen.