Jeff couldn't hold out any longer.
His hands gripped the hard plastic exterior of his fleshlight-girlfriend while his cock was buried to the hilt inside her very-real vagina.
Jeff had never cum inside of a vagina before and he immediately learned how pleasurable it was. He looked down and watched his cock jerk around as he held it deep inside Jenny. He saw her clit vibrating and pulsing. She was fully aware of the white liquid filling her body up and it was making her cum too.
Jeff groaned and his entire body shook. His orgasm was stretching out and lasting an entire minute. He had never felt anything like this before.
As the cum started to leak out of Jenny and run down his cock, Jeff heard the machine whirr and engage again. Jenny must have set a timer for another change!
The knowledge tickled Jeff's brain and gave a jolt to the aftershocks he was feeling. Even though he had finished ejaculating, his cock remained hard and his body felt nearly as good as it had during the orgasm itself. As the familiar tingly sensation crossed over his body, Jeff realized he was beginning to change.