No thoughts just mer!reader who was born in captivity and doesn't really understand how to mate...
It's common knowledge that captive mers, especially ones kept in amusement parks, can experience deteriorated instincts. They lack social skills, hunting abilities, and most importantly reproductive success.
Meaning, when you're transferred into a mer sanctuary, it's expected for you to have trouble bonding. They place you with a formerly wild mer, id-tagged "ghost", as he's very forward. The hope, of course, that you'll be pupped come winter.
You clearly want ghost, you just...don't know what to do, it seems.
"What...surely not." Gaz, your main caretaker, whispers under his breath. Inside the tank, you chase ghost around, webbed hands grabbing at his face only for him to huff and turn away. At first it looks like some strange dominance display, but the longer he looks the more gaz realizes you're trying to kiss ghost.
Of course you learned your mating behaviors from humans. You probably saw enough PDA for it to imprint on you.
A quick consult with his supervisors, and gaz has you laid out in the shallow waters of the observation shelf. You blink up at him all docile, having grown up in similar positions during your husbandry work. You don't thrashi or growl like other mers, comfortable with you snout nudging Gaz's knee, licking at the wetsuit material.
"Okay, runt, let's help you out, yeah?" Gaz hums, signaling ghost over to slide onto the ledge like he would for an exam. "Ghost! Up here!"
It's easy getting you and ghost into the correct position, though it would be more natural for you both underwater. You chirp curiously up at ghost, completely oblivious with no instincts to guide you on how to feel about a mer lying on top and pinning your tail down.
"Okay, ghost, I'm sure you know what to do. Just let me–" gloved hands slip into ghosts slit, pulling his cocks out instead of waiting the extra time for them to emerge. Ghost grumbles a bit, knocking his head against gazs side before focusing back on you as gaz lines him up.
"Here we go." He smiles approvingly at the whine you let out on the first thrust. A bit shocked, a bit blissed out already. "Bet that feels real nice, eh?"
You squirm and chirp more, body wriggling under ghost. Clearly you want to participate, but every attempt to reach for ghosts face earns a corrective nip. Gaz, who had been too focused on ghosts cock rutting into you, didn't have time to react when you reached for him.
"What–! Hey! Mhhp–" a long, slippery tongue forces it's way inside of his mouth, thick and warm. To another mer, if kisses were at all normal, it would feel astonishingly tender. For gaz it feels like being face-fucked.
It shouldn't feel as good as it does, but he can't stop it, not when you decide to go deeper and he really has to focus on breathing through his nose.
Above the both of you, ghost rumbles approvingly. bracketing one arm around you and the other around gaz, he keeps what he now recognizes as two mates close together.
When ghost finally cums, gaz is mortified that the second cock is aimed directly at him. Milt splashing across his wetsuit.
He...really hopes no one saw that. He also may need a really cold shower before he does something he shouldn't.