Sally returned to her beach bag and her own towel then went to shower off. Her bikini top was gone, but she had a shirt in her bag. It fit uncomfortably over her new dorsal fin. She went to the lifeguard tower to return the lifeguard's towel and on the way thought about how she hadn't had a date since the accident that had ruined her mouth.
"Could I think you for your help over dinner?" she asked him. Jake, the lifeguard, readily agreed. She was quite attractive. They set a time for a seaside seafood restaurant than evening.
Sally went home, careful not to keep her back off the seat as she drove so as not to crush her dorsal fin. The best part of getting home was taking her shirt off so she could go around topless. Her dorsal fin felt much better. In preparing for the evening she selected a blackless dress that would leave her fin free. Some rolled up towels on her car seat also made driving easier.
She and Jake met up as planned. He was quite impressed by her dress. Sally appreciated that he'd asked for table instead of a booth. Her dorsal fin hung just above the back of the chair. Various people at the restaurant had double-takes or stared curiously, but Sally paid no attention to them.
The two had a fun dinner date. They talked about their experiences on swim teams at different schools and how Jake had been motivated to become a lifeguard after a friend nearly drowned. He asked the obvious question: how did she end up with a dorsal fin? Sally told the story of the accident and her mouth injury, and how the experimental DNA treatment had regrown her teeth. Besides the dorsal fin, she had developed a craving for fish. "I guess getting injected with shark DNA has some side effects" she admitted.
It was dark by the time dinner ended and the two went for a walk on the beach, holding hands. After some more talking and joking, they stopped to admire the moon which led to an embrace and and their first kiss. As they did, one of Jake's hands brushed Sally's fin. She gasped a little.
"I'm sorry" said Jake.
"No, don't apologize" said Sally. "That didn't hurt. That felt...amazing..."
Now Jake deliberately stroked Sally's dorsal fin with his hand, eliciting a moan. Sally couldn't believe it: her dorsal fin was an erogenous zone! She had been really enjoying the evening, wondering how long it might last and how it might end. Now she knew for sure what she wanted. Sally grabbed Jake and pulled him into another kiss. Their first kiss had been slow, gentle, romantic. This second kiss was forceful and hungry. They tumbled to the sand, making out furiously, Sally on top and Jake continuing to stroke her fin.
Unbeknownst to Sally, with her blood pumping and her hormones raging more sharky changes would soon occur.
When Sally couldn't wait any longer, she stood up, and quickly glanced around to ensure they were still alone on this dark stretch of beach. Then she pulled her shoulder straps to the sides and let her dress fall to the sand.