Karyn gently stroked Jon's long, hard cock. Jon leaned his head back and moaned with pleasure. Karyn had never had the chance to play with a penis before, and decided that this was a good opportunity. She leaned down and kissed the tip of Jon's dick. He shuddered and moaned again - Jon had never been with a girl before, either, and Karyn's touch felt a lot better than his own hand.
Jon said "Don't stop...", so Karyn didn't. She took the tip of Jon's cock in her mouth, and started to stroke it with her tongue. Jon moaned in pleasure. Karyn took more in, but it was so long that she started to gag. With a thought, she slowly shrank his penis down until she could easily fit the whole thing in the front of her mouth.
Jon couldn't see what was going on, and was too overwhelmed with sensation to notice the change anyway. He simply felt Karyn taking his whole cock into her mouth, touching it with her tongue and her lips. Moaning with pleasure, he forgot to warn Karyn that he was about to come. He blew his load right into Karyn's mouth.
Karyn jumped back in surprise as the hot semen started pumping into her mouth. "God Jon, why didn't you warn me?" she said.
"Sorry Karyn, it felt so good!" replied Jon.
Karyn spat into a tissue and said "OK, fair enough... but I think you owe ME one now." She pulled off her pants and her panties, giving Jon a glimpse at her shaven pussy.
"Wow" said Jon.
