"Mommy…"
"What is it, honey?" she asked, knowing what it would be as she unavoidably watched her daughter's throbbing member swell in the rearview mirror. Violet's pulsing cockhead was inches behind Joy, nearly jutting above the headrest.
"Cummy," said Violet, in her sharp, decisive voice. Here? Now? Joy had tried to 'take care' of her daughter before they left, making sure she let out at least three distinct loads, gallons upon gallons of the white slurry pumped into the special drain she had installed in their home. She had naively hoped that might have been enough to temporarily sate little Vi's libido for at least long enough to reach her doctor's office for this appointment. Even still, she should have known better than to take her out without a double layer of the oversized condoms she used for protection in public. But they were expensive and Violet had gone through the box after her last outing. Joy had planned to buy more on their way back from the doctor's office.
But here she was, with her daughter's immense cock, sticking straight up, clearly visible in the mirror. The thought of what anyone who glanced at their car might see was mortifying.
As much as Violet's condition had been a constant strain on her mother— Violet had begun to spontaneously orgasm since before she could walk, constantly making sticky, pungent messes; the problem only escalating as she got older and her growth accelerated— Joy still wanted the best for her daughter. That meant taking her for regular checkups with a specialist like their appointment for today.
"Honey, we can't," she said, turning around to face Violet momentarily, and trying to hide her own embarrassment. "We're almost there. Try to hold it for Mommy, please."
"Cummy," said Violet again, louder this time. "Big, big cummy!" Joy saw her daughter's penis pulse, as if it were about to burst. She saw the milky white fluid start to ooze out of the tip.
"No, honey… Please, not in the car," she said, turning back to the road. "You'll make a mess all over the seat. I'm sorry."
Violet didn't seem to hear her. Her body was in overdrive now, her enormous cock swelling even further as she struggled in her carseat, her legs trembling, testicles which were each the size of her torso, roiling. Joy braced for the inevitable.
Had it been vanity that made Joy decide to go out without the plastic galoshes and raingear she donned around the house to protect against her daughter's discharge? Joy had put on one of her few remaining pretty dresses that weren't yet stained and utterly suffused with her daughter's cum. She knew that when Vi came, it would soak into everything: the dress, her heels, the car upholstery, her hair.