The cave was secluded and quiet, with a beautiful view of the sunset and gentle waves rolling in. It was perfect for secret rendezvous with a certain mermaid, who lay in the shallow water and let it flow over her, dark green hair fluttering in the waves as she hummed and sighed, fingers teasing the slit in her tail as she waited for her human. Isla waded through the water, grinning when she saw Belle already so horny and waiting for her.
"Are those new clothes?" Belle breathed as she peered out of the water, hungrily eyeing Isla's red string bikini that left barely anything to the imagination.
Isla smiled as she sunk into the water next to Belle, hand already sliding up her tail to replace her fingers in the mermaid's slit. The mermaid whined and Isla leaned in to kiss her, loving and soft as she teased her fingers around the edges. "It's called a bikini, and yes, I bought it just for you," she murmured against her lips, slowly sinking a finger inside her and grinning as Belle let out a shaky moan.
It was so fucking sexy to be able to play with Belle, a mermaid in constant heat because she preferred the touch of humans to her own kind. Her best friend, the hottest girl she had ever seen, desperate for her to make her scream every day... Isla couldn't think of anything better to occupy her days. Belle was squirming and begging her for more, and Isla added another finger, slowly thrusting inside the cool, slick hole, trailing her kisses down the mermaid's neck and teasing the tip of her tongue along the gills that fluttered as Belle gasped for breath.
As she fingered her faster, pressing deep inside in a way that made Belle's tail tremble, she kissed her way down Belle's chest and took a nipple into her mouth, sucking lightly. The mermaid yelped, thrusting her hips against Isla's hand, her tentacle cock emerging and attempting to wrap itself around the girl's wrist. Isla just continued pleasuring her, teasing the nipple with her teeth and thrusting her fingers until Belle cried out and buried her face in her neck, gasping and groaning as a shiver ran through her body.
"So, how's life under the sea today? Is mating season over yet?" Isla hummed, idly stroking the iridescent scales of Belles tail as the mermaid relished the afterglow.
"Yes. I'm the only one left," Belle sighed, slipping back down into the water to stretch out, taking a few deep breaths before she peered out again. "There is news. A new pod has been seen moving into our territory."
"More mermaids? Where from?"
"Colder waters. They're scary, though. Sharp teeth, a wild look in their eyes..." Belle shivered, shaking her head. "I don't think they will stay for long. But we are all on edge."
"Scary new mermaids, hm? That sounds rather exciting." Isla longed to know what life was like among the mermaids, but such things were beyond her reach.
"It is much more exciting to be here with you," Belle cooed, hands sneaking up to grab Isla's hips and pulling her down into the shallow waves with her. The human giggled as Belle nuzzled kisses into her neck, trailing her cold lips down the warm skin and raising goosebumps in their wake. Isla sighed and leaned back as Belle kissed her way down her chest, pulling aside the pretty red bikini top to expose her hard nipples, and she couldn't help but gasp and whine as the mermaid took one into her mouth, teasing at it with her teeth and icy tongue. Her toes curled in the sand at the feeling. There was something so thrilling about the way Belle touched and teased her, knowing exactly how to drive her crazy.
The mermaid was impatient though, and she also knew exactly how horny Isla was, her fingers trailing up the human's leg and dipping under the bikini bottoms to tease her soft warmth. Isla spread her legs eagerly, moaning in delight as Belle pulled the fabric aside and dipped her face between her legs, the cold tongue ending shivers through her as it lapped at her clit and teased up and down her slit, making her squirm.
Suddenly, Belle rose quickly again, eyes round and terrified. "You're hurt!"
"What?" Confused, Isla looked down, spotting the wisp of blood floating away in the current. She hadn't felt anything, but her periods were always rather light and easy. Of course Belle would be confused. "Oh. No, I'm not hurt. It's only a little blood, and it's natural. It's part of our mating cycle. Only ours isn't once a lifetime, it's every month."
"You're not hurt?" Belle needed reassurance, obviously scared that she had injured Isla somehow.
"I promise I'm not hurt," she chuckled, leaning in to kiss the mermaid's forehead reassuringly. "You don't have to continue if you don't want to, but I will be perfectly fine if you do."
"Oh! Well, if you're sure!" Belle grinned in relief and dove back under the water, and Isla moaned, arching her back as Belle put her tongue to work again. She obviously had no qualms about a little blood, and it showed as she ate Isla out with practised, passionate precision.
A little blood. Hardly noticeable. But it diluted and washed out to sea, perking the interest of an unruly visitor.
Much later, after the girls had been swimming, fucking some more and searching for trinkets in the rocks, Isla was sunbathing on a rock while Belle went out to catch some fish for their lunch. Her bikini top had been discarded and her feet dangled in the water, and she stretched out under the warm sun, drowsy and at peace. Life was good, days of Belle and sex and the ocean stretching out before her for as far as she could see. The thought made her smile.
