Jen sat there enjoying the breeze for a while, the sun reached the middle of the sky, and then she felt an odd feeling in her crotch, she looked down to see a penis, poking out of her pussy, and small balls underneath it.
"What the hell?"
The a second poked out and they began to throb.
"This can't be happening!"
At that second they swelled, growing to 6, 7, 8, 9 inches. She touched them and her balls surged to full size. They sat and throbbed for a few seconds, Jen stood up, then suddenly her balls surged to epic proportions. She screamed when she landed on them, her penises exploded to a size of three feet. She started frantically stroking them, hoping that they would stop if she cam. She blasted cum out of her two dicks, but to her horror they didn't stop, they swelled out to ten feet, their heads landing hard in the dirt, her balls now the size of bean bag chairs, she started to cry. She didn't know how big they were going to get, but it scared her.