Jake slid his hand into Kelly's leggings to be certain. Kelly shuddered when his webbed hand caressed her new penis.
Wait, webbed? Already? Kelly looked Jake over. Maybe it was a side effect of the arousal and ejaculation, or maybe because he'd already worn the leggings once before, but Jake was already fully a frog girl.
Jake looked up at Kelly who was on top of him. Her change was preceding slower, with the green skin having only advanced up to her midsection. Jake felt wetness, a familiar one from his last transformation, but even stronger this time. Jake pulled Kelly, who was on top, down with one arm into a kiss. The other hand continued to stroke Kelly.
Kelly kissed Jake back hungrily, enjoying the feeling of his frog tongue in her mouth. It felt so strange to have a penis, yet so pleasurable. It was getting so hard from Jake's stroking. The couple looked each other in the eyes, and both understood they wanted the same thing.
Kelly pushed the leggings down just enough to free her cock and balls. Jake likewise pushed his leggings down just enough to expose his new vagina. Kelly slid into Jake's wet, puffy lower lips and into slimy depths. Jake moaned. He'd loved the girl-on-girl action the first time they both transformed, but this was something else. Kelly pulled back then thrust, trying to get a hang of the role reversal. Jake took Kelly's hands and placed them on his green breasts then reciprocated on her still human breasts with his webbed hands.
They thrust and fondled until Kelly felt another new sensation she didn't quite understand at first. Then she erupted into Jake and belatedly understood. Could she impregnate Jake? She didn't know. All she knew was she was pumping Jake with her froggy semen. Jake, having never had someone blow their load inside him before, orgasmed in response to the sensation. Both spent, Jake and Kelly collapsed blissfully into each others arms on the couch, bodily fluids leaking off to the floor. As they drifted off to sleep, Jake noticed Kelly's upper body had turned frog green, but she had retained her breasts.