sparks_of_sunshine
After becoming Ruler of Equestria, Twilight encounters a certain guards pony at the Canterlot Castle. Despite their social statuses, they find a strong attachment for one another.
Soon after, a long lost king attempts to take back Equestria.
"Unable to use her magic, he pinned Twilight against the wall with his muzzle close to hers. 'I knew you were the ruler, but I never knew you would be so...' He took a deep inhale to smell her scent. '...elegant...'"
" 'You'll never rule Equestria!' Twilight growled."
"'Oh you think that huh?'" He luminated his horn...revealing Starswirl the Bearded lying on the floor."
" 'STARSWIRL!' "
...
"You think I'm that stupid thinking you wouldn't get away, DID YOU!?"
He pinned her down, leaned closer...and licked the side of her face as if she was dessert.
"Leave me alone..."
"This is just the start, my princess..."