As her orgasm began to subside Becca felt something draw on her balls from behind. Soon her balls grew and got so big that she ended up sitting on her ballsack, unable to touch the ground with her feet, while her dick remained unchanged. With the growth her balls had swelled and, her orgasm that was waning, it intensified again.
"What have you done to me Jen? Becca asked in the midst of her endless orgasm
"Nothing much. I know what you like cum, so that's why I increased your reserves and production capacity. Now you can come non-stop." Jen said smiling
"I... I... aaahhhh.... that's good but... everything has a limit." Becca said as she came. Before long Julie made a pained expression and put her hand to her stomach, realizing she was at her limit and Becca dropped her, leaving the pussy-faced girl lying on the floor with a belly so big she looked like she was pregnant with twins.
Julie just lay there, looking at Jen wanting to say something, but she couldn't as she didn't have a mouth.
"Do you want to say something Julie? Want me to give you your mouth back?" Jen asked to the pussy-mouthed girl, who made a positive nod.
Jen did as her friend asked but in her own way. She took off Julie's pants and then her panties, then she took the magic pen and drew lips around the vagina between her legs, which soon became a mouth.
"I just wanted it to help me get rid of so much cum inside me and not make me more of a freak." Julie said
"Please make me stop coming." Becca still cum, the amount of cum coming out of her dick unable to beat the amount her balls produced.