Work Text:
"Okay Evie, just watch the TV" the teenager said breathlessly, one finger already in the little girl's ass.
The teen had been babysitting his sister for months. For his parents it was a weekly date night, for the toddler it was getting to stay up late watching TV. And for him, it was a chance every week to touch, smell, and taste a tiny girl - as small as the pictures and videos he watched online.
It started when baby Evie was 2 1/2. He'd changed her diapers many times since her birth, an "oops" accident 15 years after him. The first time he babysat though... laying the happy toddler down on the floor, peeling her Pampers open, knowing he was doing it for his own sexual gratification - he'd cum in his pants before he even touched her.
Months later, the skinny little blonde was three years old, potty trained, and had every inch of her small body explored with his tongue and fingers. Smooth, round toys, like the ends of paintbrushes and markers helped his exploration of his little sexy sister. As she sat and watched cartoons he'd lubed them up and pressed them gently home, giving her little botty time to relax and allow the penetration. He worked slowly, carefully, never causing pain, just helping her relax more and more.
Now was the day. She was three, potty trained, and with only a little warm up able to take two of his fingers inside. Last week she'd bounced excitedly on his index and middle fingers, driving them into her ass deeply as she watched "Peppa Pig".
The teen lifted the toddler, one arm under both legs. With the other hand he guided his cock between skinny, pale cheeks. The tip of his cock touched the warm, soft flesh of her sphincter.
He lifted his hips up and lowered her onto him at the same time and with shockingly practiced ease the three-year-old's sphincter relaxed and the boy's cockhead was squeezed by the velvet heat of the toddler's ass.
She never cried, never whined. Just sat happy as could be as her big brother worked the full length of his cock up her ass and filled her with cum.