Karyn's mom dropped the wishing stone, then bent down and began sucking and licking Ben's breasts. She never could have imagined herself doing anything like this. But she was, and she discovered that she liked it. A lot.
She pulled out her throbbing penis from her panties and her "former" husband took it into her mouth. Karyn's mom felt waves of pleasure flow through her as the now-female Ben sucked on her new penis. Ben seemed to be enjoying all of this just as much as her, because she heard moaning coming from her.
After the oral sex came the intercourse sex. And that was even more enjoyable for the both of them.