Hello! If you couldn't tell from the title, the plot of this idea revolves around the Terminator franchise, specifically the Fox series The Sarah Connor Chronicles. Previous knowledge and experience would be nice, but far from necessary.
Everything is mostly the same as canon, with John in high school, he and his mother Sarah work to stop the development of Skynet. As the latest Terminator closes in, Cameron, a reprogrammed Terminator is sent back by the future John Connor to act as a new bodyguard to his earlier self. To this end, Cameron leads the two Connors to our present day, still before the development of Skynet, but hopefully out of the watchful view of the Terminators.
Now, the change to canon is, as you may have guessed, the relationship between John and Cameron. In the future, John suffers from the common plight of high powered decision makers in that when it comes time to relax, they don't want to make decisions. To that end, as part of Cameron's reprogramming, he taught her to become his Mistress. Now in the past, with access to a strong and virile teenaged version of her downtime plaything, she intends to continue that relationship.
What I'd like to discuss with potential partners is just how that will go about. Did John tell her to initiate something with his younger self? Tell her to wait? Is she doing this on her own? How might she tell this savior of the human race that he likes to submit his body to the whims of the very thing that hunts them down? The raw irony of it makes me laugh and so desperately want to play it out.
Anyone willing to take on the part of