Kick

"Can you spread his legs?" said Rachel, releasing Paul's trapped boyhood and standing up from the stool.

Paul had given up on trying to scream, he was sobbing like a baby, desperately trying to **** the briefs from his mouth.
He watched his young tormentor as she removed the stool from his knees and placed it under the desk, breaking eye contact with his body for the first time since she came into his view. Paul took the opportunity and pumped his mouth in a motion resembling a fish, shifting the cylindrical gag upward with his tongue, until a moment came when the briefs were finally **** from his gullet, landing on his side, covered in his saliva.
He inhaled oxygen greedily trying to catch his breath and let out a soft cry for help, still too weak and air-deprived to be audible enough for the sound to carry anywhere passed the room which the girls have deviously adapted for their vicious exercise.

Laura reacted to her younger sister's instructions and addressed this new development in one fell swoop.
She grabbed Paul's arms with her own and lifted her ass up allowing his head to drop to the carpet, moved her body towards the boy's legs, and sat back down placing her knees back on his arms with her crotch on his mouth. The older sister then leaned forward and grabbed the boy's legs in each hand, hooking them at the knees, then pulled them back as far as they would bend spreading them in a wide V shape.
Paul was once again limited to one source of inhalation, as the girl's ass sat firmly on his nose forcing him to breathe only though his mouth, inhaling the sweet musk of the girl's damp crotch.

Rachel turned back to Paul and giggled at his precarious position, unconsciously licking her lips while ogling the exposed, **** man-orbs hanging invitingly between her classmate's restricted legs.
The young girl tormentor positioned her left foot inside Paul's V, brought back her right leg and moved it slightly back and forth as she took aim at the target presented by her sister. Without breaking eye contact with her mark, she released her foot sharply into Paul's unguarded balls, striking them both with a satisfying splat as they bounced onto his stomach.

Paul shrieked with pain was muted by Laura's smothering groin, stirring a sudden sensation of pleasure for the older girl as her vagina quivered with the vibration of the boy's tortured scream.
She released an involuntary moan, but maintained her focused grip on Paul's legs despite them twitching frantically.

Rachel watched intently as the red, tortured orbs rolled back down, timing her next kick to impact the instant they returned to their natural position, sending them back up Paul's stomach. Her foot swayed with the cadence of a pendulum, smashing Paul's helpless testicles in an alternating back and forth dance. Focusing entirely on the flopping balls, she was amused by the reliability of these nuggets always returning for more punishment, her quiet giggles intensified with each kick as her sister's reactions went entirely unnoticed.

Laura closed her eyes, struggling to maintain composure against the onslaught of pleasure against her most intimate spot, as the warm gasps of breath and shrieks of agony vibrated her crotch, carefully positioned on the helpless boy's mouth.
The though of her younger sister joining in her delight of inflicting pain unimaginable to them both was exciting enough, and though this additional stimulation was somewhat planned, albeit quickly, the effect it had on her was greater than she anticipated.

"That's enough" she said to Rachel in a stern voice, secretly wishing to avoid having an orgasm in this circumstance in front of her younger sister, fearing she was not yet ready to see this side.