Jon tops it

Jon reached into the box and pulled out two massive doodle ended dildos. Karyn estimated each to be 2 and 1/2 feet long. Jon handed one to Karyen and she looked at him in amazement.

"What the heck is this for? We already have three pussies each." "I know," he said, then he maneuvered it into his panties and rammed it up into his ass hole. After a few seconds in which he felt a mounting arousal from a massive dildo shoved up a tight pussy, something shifted, and the dodo became a cock were his asshole/pussy had been. Jon concentrated and felt his new cock grow longer. Jon found that he could make it shrink until it was completely inside him, or grow out 20 feet long. He could also control it like a prehensile tail. He snaked it into one hand and began stroking his long black cock. His arousal was as much as he got from talking with his pussy mouth. Karyn, seeing that she had no choice and that Jon seemed to enjoy his new toy, stuck her dildo into her asshole/pussy as well. She also felt the arousal from her new appendage. "Well Karyn, do I win the prize for best change?" "Sure Jon. If it makes you happy, you won." She then reached into the box to pull out the next change.