Fulfilling the Needs of the One (Or the Both) (8738 words) by vulcaneyebrows [AO3]

Chapters: 1/1
Fandom: Star Trek: The Original Series
Rating: Teen And Up Audiences
Warnings: No Archive Warnings Apply
Relationships: James T. Kirk/Spock
Characters: James T. Kirk, Spock
Additional Tags: Old Married Couple, Romance, Established Relationship, Hurt/Comfort

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.”