Claiming the eldest sister

Attina swam down to me, her orange tail moving with a heavy, deliberate grace. Without her tiara, with her hair floating free in the current, she looked younger, more ****. But her eyes were steel. She was approaching this like a treaty signing, solemn, necessary, and binding.

"I am ready," she whispered, hovering over my hips.

"You don't look ready," I rumbled. "You're tight. You're holding your breath. If you take me like that, I will break you."

I reached up and grabbed her hips. My claws dug slightly into the soft flesh above her scales.

"Relax," I commanded. "Ariel, help her."

Ariel swam to her eldest sister’s side. She placed a hand on Attina’s back, rubbing circles between her shoulder blades.

"It’s okay, Tina," Ariel murmured, using her childhood nickname. "Just let go. It feels... it feels like filling a hollow space you didn't know you had."

Attina nodded, exhaling a stream of bubbles. She lowered herself. She positioned her vent over the left clasper, the one Adella and Alana had slicked with their saliva.

She sank down. The tip of the bone-hard organ pressed against her slit. She gasped, her hands clutching my broad, grey shoulders for support. "It... it doesn't yield," Attina panicked slightly. "It's like sitting on a spear."

"Push," I growled.

I thrust my hips upward. Slide. The clasper breached her. Attina cried out, her head thrown back, her spine arching violently. It was a tight, stretching invasion. The rigid organ slid deep into her tract, filling her completely.

"Oh... oh my..." Attina stuttered, her eyes wide and unseeing. "It’s... inside my stomach. It’s heavy."

"Locking," I warned.

I flexed. The spurs at the tip of the clasper flared slightly inside her womb. Attina screamed, a sound of shock and overwhelming stimulation. She tried to lift off, but she was anchored.

"I can't get off!" she wailed, thrashing her orange tail against the sponge bed. "I'm stuck!"

"You're mated," I corrected. "Now ride the current."

I began to move. The shark mating rhythm was different - it wasn't about speed, it was about power. I ground my hips, twisting the clasper inside her. The texture, the hardness, the internal pressure, it shattered Attina’s composure instantly. The responsible eldest sister vanished, replaced by a whimpering, pleasure-drunk mermaid.

"It’s too much! It’s too big!" she sobbed, but she was grinding back, her hips moving in a frantic circle.

The sight of their leader being so thoroughly dominated sent the other sisters into a frenzy.

Arista, the most energetic of the sisters, couldn't stand the sight of the wasted potential.

"There's another one!" she shouted, pointing at the right clasper, which was standing rigid, bone-white, and neglected next to Attina’s working hip. "That one is mine!"

She didn't wait for permission. She dove. She didn't mount it; she attacked it like a predator claiming a kill. Arista wrapped her wet, eager mouth around the second clasper, taking the entire length of the spiked organ down her throat. She bobbed her head furiously, her hair creating a cloud around my groin, humming with a vibration that sent shockwaves through my lower body.

"Hey!" Andrina complained, swimming down into the fray. "Save some for the rest of us!"

Andrina and Adella moved in, **** for scraps. They couldn't get to the main event between my legs, so they went for the body. They attacked my chest with a frenzy of lips and hands. Adella grabbed my left pectoral fin, biting down on the thick cartilage playfully, mimicking the dominance I had shown Ariel. Andrina kissed her way down my abs, her tongue tracing the deep, serrated lines of my muscles, cutting her lip slightly on my rough skin but not caring, loving the taste of the monster.

Aquata was still lost in her own private world near my tail. She was grinding her cloaca frantically against the rough, sandpaper skin of my caudal peduncle. The friction was intense, raw, and unforgiving, pushing her to shudder with silent, dry orgasms from the abrasion alone.

It was a symphony of sensation. Attina riding me deep. Arista sucking me dry. The others worshipping the shark form with every orifice available.

"Attina," I roared, grabbing the eldest sister’s face, my claws digging into her cheeks, forcing her to look at me while I bottomed out inside her womb. "Look at me! Who owns this breach?"

"You do!" she screamed, tears mixing with the ocean water as her eyes rolled back. "The Shark! The Master! You own everything!"

"Then take the mark."

I pulled her down. She collapsed against my chest, her soft breasts smashing against my grey skin. I turned her head, exposing the elegant curve of her neck. I found the spot on her shoulder, symmetrical to Ariel’s.

Crunch.

I bit down.

I didn't hold back. I broke the skin, tasting the copper tang of royal blood, branding her as breeding stock.

Attina shrieked, her body convulsing violently. The combination of the pain in her shoulder and the stretching fullness in her belly pushed her over the edge. Her internal muscles clamped down on my clasper with crushing, milking ****.

"I'm breaking! I'm breaking!" she wailed.

She climaxed hard, her entire body seizing. I didn't wait. I poured my seed into the eldest princess, flooding her, pressurizing her womb with a thick, heavy load that ensured she would remember this coupling forever.

At the same time, Arista’s vacuum-seal suction on the other clasper dragged a secondary release from me. I shot a thick rope of seed directly into her throat. She gagged, eyes bulging as the volume hit her, but she swallowed greedily, her cheeks hollowing as she drained me, refusing to let a single drop escape into the water.

Attina collapsed on top of me, limp, twitching, and sobbing softly from the sensory overload. Arista pulled back, gasping for air, licking her lips as a trail of white mist drifted from the corner of her mouth.

"Wow," Arista whispered, wiping her mouth and looking at her older sister. "She looks... destroyed."

"She looks happy," Ariel corrected, swimming down to stroke Attina’s hair. "She looks like a wife."

I lay there, the center of the pile, listening to the rapid, fluttery heartbeats of seven mermaids. My blood was still hot. The hunt wasn't over.

I turned my black, lifeless eyes to Alana, who was watching Attina’s ruin with wide, dilated pupils, her hands trembling.

"The eldest is claimed," I announced, my voice dark and hungry, vibrating through the water. "But the school is large. And I have a lot of stamina."

I shifted, unlocking from Attina with a wet pop. She slid off me, curling up next to Ariel, touching her new bite mark with reverent fingers.

I looked at the remaining sisters.

"Who wants to learn about the teeth next?"