Zach spent the summer he turned fifteen with his aunt, Michelle, and cousin, Sonya, while his mom was taking a sabbatical in the UK. While he had never spent an entire summer there, the two families had always been close. Sonya was a few months older than her cousin and the two had grown-up almost like fraternal twins. Over the last few seasons, Sonya had bloomed from a gangly tom-boy into a striking young woman. Although they were first-cousins, Zach’s raging hormones made it almost impossible to not fantasize about newly developed assets of his life-long pal.

It was a fairly normal Saturday and Michelle had developed a chore list for the pair to tackle before they were left to their own pursuits. She then left to take care of several errands. Shortly after her mom left, Sonya got a text and then called to Zach who was sweeping the kitchen floor, “Get your suit on. We’re going to Amy’s.” Amy Moran lived a few doors down and had a backyard pool.

“Your mom is gonna be pissed if we don’t get the chores done,” Zach replied. He knew from personal experience, Aunt Michelle’s penchant for bare bottom spankings for rule-breakers. Conversely, the notion of Sonya, Amy their other friends in bikinis was a strong pull.

“We’ll be back way before mom gets home. Stay here if you want but I’m changing and heading over right now,” Sonya replied.

Predictably, the teens lost track of time. Michelle returned to find the house empty, the dishes undone, the laundry still in piles and the kids rooms in shambles. She was fuming trying to imagine why the pair had been so foolish as to leave their chores undone. Briefly she was worried that some harm might come to them but then noticed an open drawer of Sonya’s dresser. It was crammed with a jumble of swimsuits, causing her to imagine the kids heading to a neighbor’s poor rather than something more nefarious. She walked into the backyard and listened and followed the noise of voices and splashing coming from the direction of the Moran’s backyard.

Michelle stood in the gateway for a few minutes surveying the scene. The action of innocent enough - nobody was naked, drinking, smoking or anything illicit. Nevertheless, she was seriously vexed that Sonya and Zack had shirked their jobs. If they had asked permission to delay their chores, she might have actually agreed. But now she was faced with responding with appropriate severity at their misbehavior. “Sonya! Zack! Time to get home and finish your chores.”

“Shit,” Zach mumbled realizing his fears were coming true.

A few minutes later they all stood in the kitchen as Michelle scolded the scofflaws. When she had run out of words, she commanded Sonya, “Go fetch the brush. You both are due a hot seat for ditching your chores.”

“Mom!” Sonya briefly pleaded but then realized the futility of the argument and turned to fetch the implement that would sear her tush. When she returned, her mom was seated in a kitchen chair. “Over my knee, young lady.” Sonya paused indecisively. She had always received spankings on a bare bottom but it had been years since she and Zack were spanked together. Since the last communal spanking, her body and sense of modesty had changed significantly. “Do you really want to test me,” her mother threatened. “Get those shorts and bikini bottoms down and over my knee! Now!”

Sonya reluctantly bared her bottom and draped herself over her mom’s lap. At first she thought having Zach see her like this would be worse than the spanking itself. Then Michelle began to paddle her daughter’s bottom and Sonya forgot all about her exposure as the intensity of the pain in her ass grew insurmountable. She glanced over at Zach and through her tears noticed how he was looking at her and the enormous bulge in his pants. When the swats ended, Sonya sprung up and danced around the room. Her shorts and bikini had been kicked free and she was completely bare but hardly concerned about the nudity as her focus was the searing pain.

“Zach, your turn,” Michelle announced. He paused beside his aunt and Michelle having no more patience for delays jerked his board shorts down and his erection sprung free. Paying no heed to his arousal, she pulled him over her lap and began a fierce paddling of his cheeks.

Sonya for her part was intrigued by her cousin’s boner. It was the first, in-person hard-on she had seen. While not the enormous cocks usually seen in porn, it had nevertheless captured her imagination. As the heat in Zach’s ass grew, Sonya fantasized about being taken from behind immediately after an intense spanking, something well larger than her own finger thrusting deep inside her as her partner’s pelvis collides with her stinging bottom.

Zach’s preoccupation with the sight of Sonya’s bare ass being paddled and the unfettered view of her genitalia as she wriggled and kicked was forgotten as his aunt’s brush pummeled his ass cheeks. After a seeming eternity, he realized the swats had ceased. He jumped up and retrieved his shorts to cover his crotch as he hurried from the room.

Michelle was satisfied that the message had been delivered. She returned the brush to her dresser pondering the sexual tension evident during the session. She worried that spanking the two together had only exacerbated the situation and fretted about the two teens perhaps acting on their carnal urges.