Clia smiles sweetly. Her voice is full of love when she says, "Go. I'm too tired to join you, but I'll be right here waiting for you when you get back." She then curls her tail around herself, closes her eyes, and snuggles down to take a nap on the sand. You can't help but find Clia adorable, all cuddled up with her head resting on her own tail, and her fin covering her face like a veil.
Before another thought can enter your head, Thea and Lyla each grab one of your arms, and soon the three of you are swimming at a breakneck pace over to the spot where the two lesbian mermaids had earlier spawned their clutches.
You arrive to find this new nest positively overflowing with eggs, easily twice as many as Clia had laid. A gulper-eel with dull purple scales lurks on the edge of the nest, its ugly face poking out between the sheets of kelp. The two mermaids both make an offended noise, the same sort of gasp you'd expect from the shocked sensibilities of a woman in a Starbucks who got soy milk instead of almond milk and was then informed that there was no manager around to complain to. The two mermaids rush into the nest to guard the eggs and shoo the predator away, and Lyla calls out after it, "That's right; and stay away!"
"Stupid, ugly eels," grumbles Thea. She bends down over the nest to look at the eggs and make sure they're still okay.
"So," you ask, half-joking, "how can you tell whose are whose?"
"We let 'em mix on purpose because it doesn't matter," answers Lyla.
"That's right," says Thea. "Whoever the egg came from, we'll both be their mom."
"And you," says Lyla, putting her hands on your shoulders, "get to be their sire." She kisses you and drives her tongue into your mouth. You wrap your arms around the gorgeous mermaid and just enjoy the kiss, letting her rile up your libido again.
"Don't get us wrong," says Thea, who comes up behind you and starts to tickle your gill-slits with soft kisses and gentle strokes of her tongue. "In merfolk culture, a sire is basically a glorified sperm-donor. But if this works and we do manage to make a baby or two, you can still be a part of their lives. At least, we hope you'll want to."
The feeling of Lyla's tail rubbing on your belly-scales and Thea's crushing your dorsal-fin down is weirdly exhilarating. Then Lyla breaks away from kissing you and gives a coy, knowing grin. "Of course I will," you start to say to Thea, who is now floating lower behind you and running her hands from your chest down to your abs. "I wouldn't—oh. Oooh."
It's clear by now that the mermaids want to make you fertilize their eggs quickly, and so they're making this little threesome all about you. They each pick a nipple to suckle and tease, and at the same time, they lower you down so that your fishy genital-opening is positioned right over the nest and pointing at the pile of eggs. The water here is positively saturated with mermaid mating-pheromones, and you once again begin to feel that hazy, half-drunken feeling that you now know to associate with the fluid that accompanies their egg-laying.
For whatever reason, the combination of circumstances—the pheromones in the water, the thrill of two stunningly beautiful mermaids teasing at two of the most erogenous spots your body still has left, and the thought of just cutting loose and creating offspring for these two mermaid moms-to-be—it works wonders for your body's ability to respond to merfolk sex. Just as your nipples are getting to the point where you want to beg Thea and Lyla to stop stimulating them, Thea swims up to kiss you on the lips, and Lyla lowers herself down to kiss and lick at your slit, and that pushes you right over the edge.
The orgasm is just a little bit more intense this second time, a little bit closer to what you remember from when you were a human man, and it also lasts a little bit longer. You feel the muscles around your urogenital vent contract a few times before your body is left quaking from the come-down, and you've produced yet another cloud of white fluid in the water, nearly as much as you had earlier with Clia. Only now, the mer-jizz is falling down onto a full nest of Thea and Lyla's eggs, mingling with them, giving them life.
The two mermaids sink down to the sea-floor, where they can peer closely at their nest in fascination and joy. It's almost as if they've forgotten about you already. Almost: after a moment of watching the sperm and egg mingling in action, Thea swims up and kisses you again, and Lyla does the same, and they both thank you profusely. Neither of them seems to want anything more from you, and when you ask, "That's it?", clearly implying that you'd be happy to keep going if that's what they want, Thea answers, "Yep, stud, that's it. You'd better get back to your mate now, before she misses you."
Lyla, though, has other ideas. "Just a moment, before you go." She swims up to you and positions her egg-vent or mer-pussy or whatever you prefer to call it inches from your face, an obvious invitation. You feel another rush of pheromones, and you almost can't help yourself. You dive in and lustily go down on the exotic, green-haired siren.
Lyla lets out a high-pitched squeak of pleasure and enjoys your mouth for a couple of minutes; then she pulls away and draws Thea near, and offers each of you a breast. "Give the girls some love, would you?" And so you spend a bit of time pleasuring Lyla's boobs, until Thea finally pushes you away and says, "All right, all right, that's enough, lover-koi. I'll take it from here."
Soon enough, Lyla and Thea are locked in an erotic embrace together, and they only have eyes for each other. Suddenly feeling like a third wheel, you make a discreet exit and swim away to go find Clia again.