Sally floated in the pool with only her eyes and dorsal fin above the water. She watched her father go back inside and disappear from view.
"Hi Sally" said the technician. "I'm Adrian."
Sally's looked over the new arrival. He was a handsome young man and look fit. She had felt so lonely since her accident. She had her parents and had seen friends, but she found it difficult to attract guys when she couldn't smile.
"I need to take a blood sample for the lab and I wanted to ask you a few questions" said Adrian. "Are you able to leave the pool?"
Sally swam over to the pool stairs and Adrian followed. She made to walk out of the pool slowly, facing him, letting the water run down her body and accentuate the curves of her naked body, smiling the whole time. She flashed her toothy grin when she saw his pants tighten.
Adrian looked her over, for science and for his own personal satisfaction. He walked around, examining her body and making some professional notes. Her skin tone, her tail and the fin on her back. Adrian asked Sally to describe her changes, her diet, and various other details since her injection of the experimental DNA. He explained the need to take a sample, got his kit, and drew some blood from her arm. Then it occurred to him to take a blood sample from her tail. Surely they would be the same, but this was an extremely unique case and he thought it best to be certain.
Then Adrian added a request that was more personal curiosity than necessary scientific inquiry. "May I touch your tail?"
"Please do" said Sally, eager for his touch.
Adrian ran his hand down Sally's tail, feeling the unusual texture: rougher than normal human skin, but not as much as a shark. He needed to contrast so he then ran his hand down Sally's lower back and onto the base of her tail, feeling the subtle transition from human to shark. She squirmed a little under his touch, causing his hand to partly graze her butt cheek. Sally could feel her heart beating faster.
Feeling the temptation to stray beyond professional ethnics, Adrian tried to focus back on his work. He walked over to the nearby table on the pool deck to his kit and secured the vials of Sally's blood in them. Before he could turn around, Adrian felt Sally's arms around his chest. Her damp body pressed against his back, especially her bare breasts. He felt Sally's breath on his ear.
"What are your thoughts on...interspecies mating?" she asked, almost panting the words.
One of Sally's hands slid into Adrian's pants, grasping his erect penis. They both knew the answer.