Fulfilling the Needs of the One (Or the Both)

Spock begins to wonder if his relationship with Jim has been one-sided in his own favor.

An old married Spirk fic written for the K/S Valentine Calendar. This story actually started and evolved from this anonymous writing prompt on tumblr: "Old Married Spirk where Jim teaches classes at Starfleet and Spock is an ambassador. Spock goes to visit Jim in his office and finds a student with a bit of a teacher kink being a bit too forward with Jim. Spock finds a streak of possessiveness he didn't know he had."