Jessica woke up in the morning curled up with Adrian. She took a few moments to enjoy the feeling of his arms around her. Her skin felt dry and desperately felt like she needed a shower, but otherwise Jessica felt normal. She checked her backside with her hand, confirming she didn't have a tail. She felt disappointed. Then Jessica felt Adrian's dick poking her in her back. She smiled. Shark tail or not, she hoped he'd fuck her with that gray beast until she couldn't walk.
In the meantime, Jessica slipped out of the still-sleeping Adrian's grasp and stripped off her clothes while heading for the bathroom. She turned the water but left the door open. Stepping into the shower felt like heaven, washing away the sweat and dirt, soothing her dry skin. Looking down she noticed at least some changes had started: the skin around her crotch was gray, hairless, and slightly rough. The changed skin streaked partway down her inner thighs and upwards onto her stomach. What would it take to change further?
Jessica heard the shower curtain open then close behind her. Then felt Adrian's arms wrap around her, his cock pressing between her butt cheeks. Jessica wondered if anal sex would get her shark tail started. Adrian began caressing her stomach before his hands moved upwards to fondle her breasts. She felt his breath on her neck then his lips kissing her neck. She leaned into him, enjoying the foreplay.
"I realized..." Adrian said between kisses "something...that happened...with Sally...that I...didn't...do...to...you..."
"Something that could affect my transformation?" Jessica asked hopefully.
"Let's find out."
The next thing Jessica knew Adrian was biting her in the neck. She cried out in pain at first, but then her cries slowly turned to pleasure as the orgasms started. She felt her shark tail begin to grow. Jessica felt Adrian release her from his grasp and thought it might be because her growing tail was pushing him away. Then Adrian let out his scream and he fell back against the tile of the shower wall., clutching his crotch.
"My dick feels like it's being torn apart!" Adrian managed to say before letting out another scream of anguish.
Jessica didn't know what to do or even what was happening to Adrian. After several minutes of screams of pain, Adrian looked down and let out a string of profanity and disbelief.
"What happened?" asked Jessica.
"You know how sharks have two claspers?" asked Adrian. Then he raised his hands away from his aching groin to reveal he now had two big gray shark penises.