As Jessica got older, rather than growing out of her crush, she seemed to give more attention to Jon. She invited him to go Christmas shopping with her, or to a ball game, and acted innocently enough. When Jon was visiting the family at her parents' house, she dressed more and more casually around him – pajamas, or a sleep shirt, or tiny athletic shorts and an undershirt. And always, to Jon's delight, wearing socks.
Jon had a thing for girls' socks, and he couldn't tell if Jessica had the same fetish or if she had just figured him out and was indulging him. Either way, he enjoyed the results. She padded around the house in white ankle socks, or floppy tube socks, or snug dark dress socks, or funky colored or striped socks, even those cute toe socks.
Sometimes she even got a little playful with her feet. More than once, she had bumped Jon's foot with her own under the table at dinner, sometimes making a joking reference to playing footsie. It was the times she didn't say anything, just left her socked foot there, touching Jon's, that he liked the best.
Jessica could tell that she was turning on her brother-in-law, and even seemed to like it, if not provoke it. One night, while shooting some hoops in the driveway, she got a little overzealous with her "man" coverage on defense, and practically draped herself over Jon while covering him. Jon remembered fondly how her hands had roamed over him as she leaned into him, her small breasts pressed into his back. A few moments later, the roles reversed, she dribbled the ball towards the goal, backing into Jon in his defensive crouch. She had pressed her body against his again, he remembered, though this time her tight little ass had lined up with his crotch. Jessica had to have felt his hard cock pressing against his jeans, Jon thought – she had to have known, right?
"Mmmm, Jessica," Jon said quietly to himself as he recalled his sister-in-law's advances over the years. He stroked himself absent-mindedly through his jeans as he thought about the sexy little kitten with the bedroom right down the hall. He thought about her veiled sexual overtures towards him, her saucy looks, her physical teasing, the taboo of fantasizing about a family member (even if it was by marriage) – it all spiraled into an intense desire.
Jon stood up in his in-laws' living room, and padded down the hall in his socked feet to Jessica's bedroom, which was empty with her and the rest of the family out of town. It was a typical teenage girl's bedroom, with a well-made bed, a couple of buff-guy posters on the wall, some stuffed animals on a shelf, and a dresser with a vanity. He glanced around furtively, knowing he was alone but feeling like he had to look over his shoulder. He moved toward the dresser, and began sliding the drawers open one by one: t-shirts, jeans, shorts, sweaters, underwear…and socks. He peeked in, gazing at her collection of cute footwear as his cock stirred in his jeans.
Jon took out a pair of dark trouser socks, thin and sheer, stroking them gently, imagining them on Jessica's feet. He unbuttoned his jeans and pulled down his underwear, freeing his hardening dick, which he started rubbing with the soft sock. He held the stocking by either end, running it like a scarf over the top of his shaft. He wrapped it around himself like a blanket and stroked his dick, his shaft warming from the friction of cloth on skin. Finally, he opened the sock up and slid it over his dick like a condom, and continued stroking it.
