You turn around to see what is pulling at your bikini only to see a small lump growing at the base of your spine. But before you can get a better look your attention is pulled back to the mermaids wen you suddenly hear a paned moaning. One of the mermaids has swam to the side of the pool and is now laying in a depression in the stone that lets her keep her lower half in the water. It's clear that she's going into labor as she continues to breathe heavily and letting out the occasional moan. As she laid there you are finally able to get a good look at the mermaid she had long brown hair and beautiful green eyes. Her scales where mostly bronze in color with a few areas being black notably her fins and the area were her scales gave way to her olive skin. As for the way her body is built it isn't exactly what you would expect her tale fluke despite being covered in scales was built more like a whale's than a fish's. She also had two smaller fins on her hips which if her convulsions where anything to go by could move, they looked kind of odd they where long coming down to were her knees would have ben, they where thicker in the front and got thinner in the back, and had what looked like bones running through them with thick webbing in between. To your surprise the underside of her tale was bare skin instead of scales giving a clear view of her anis that was nestled beneath her pussy which at the moment was wide open getting reedy to expel her offspring. Other interesting traits of her body where a line of scales that ran along her spine, scales on the back of her webbed hands and forearms, gills that appeared to be closed at the moment placed just beneath her C cup breasts, and interestingly a ring of scales that decorated her nipples.
Despite how odd the situation you find yourself in you can't help but feel oddly aroused as your clit swells and begins to ache and your vulva starts to feel wet your discomfort growing as your bikini bottom continues to get titer and titer. Suddenly another mermaid breaks the surface of the pool next to the soon to be mother. She had white and gold scales had short blond hair with red eyes and had pale skin with B cup beasts. She did not appear to be pregnant and seemed to be acting as a midwife as she began massaging the bronze mermaid and began to sing a very beautiful melody that seams to sooth the other mermaid a bit. Soon the bronze mermaid began to push her vagina parting to reveal a small head and after what felt like an hour the baby mermaid is born. As this was happening your bikini bottom had finally given up and snapped apart freeing what you now know is a tail. But some how you found it hard to care about your changing body as you have ben all but consumed buy the needy feeling in your groin. After spending a few minutes cleaning the baby the white mermaid hands the baby over to it's mother who gently cradles her child in her arms before bringing her closer to her breasts so that baby can drink her milk. No longer able to think straight do to your lust addled mind you begin to moan and whimper alerting the mermaids to your presence as you grind your wet pussy against the rock you where using to hide as gold and green scales begin to grow on your back and tail.
"Oh no" the white mermaid said before swimming closer to you "come hear quickly before the transformation finishes". Hoping she can help you with what's happening you decide to approach her albeit with some difficulty as your legs have shrunk significantly and where barely strong enough to support you. After reaching the edge of the pool the mermaid instructs you to lay on your back which you do all while furiously masturbating your wet cunt with your now webbed hands. "W-what's happening to me" you ask desperately as your legs fully recede into your tale the feet being reshaped into fins. "You pore thing" the white mermaid said as she removes the rest of your bikini "don't worry this will be over soon". Suddenly you feel a burning sensation in your lungs as you struggle to breath finally you're able to catch your breath feeling the air escaping from your new gills beneath you breasts before closing to let you breath normally. "Good you seem to have finished your transformation I need you to come with me okay once we're there I can help you with your other problem" the mermaid said as runs her hands over your needy cunt causing you to let out a frustrated whimper. She then takes your hand to help you into the water "now before you dive you need to exhale all the air in your lungs and this mite be a little hard at first but you'll need to breath in the water don't worry your gills will let you breath". You nod to show her that you understand she smiles warmly a slight blush forming on her cheeks "I'm Alohi by the way" she said before diving into the water.
Following Alohi's instructions you exhale before diving into the water and after a few minutes of trying to go against your instincts you are able to fill your lungs with water casing your gills to open back up allowing you to breath. The feeling is almost completely alien to you as you take in water through your mouth and nose filling your lungs and then pushing it out through your gills. After taking a few minutes to get used to this new way of breathing you look around to see multiple mermaids most of whom where either pregnant or holding a newborn baby. Most of them take notice of you and wile some just stare most smile and even try to make you feel welcome though you had difficulty paying attention to anything other then your all consuming lust. You continue to tease and stroke your pussy as you struggle to find Alohi in the group. You eventually find her with another mermaid with silver and blue scales and attempt to swim over to them at first you try to move what used to be your lags only for your fins to flop around. You realize that you're dealing with a whole new set of muscles as you try to ungulate your new tail and slowly but surely your able to make your way to Alohi. The other mermaid she is with appears to be in the same position as her being hear to help the other mermaids. Alohi appears to be speaking to her with some kind of sine language you think she's trying to explain what had just happened. The silver mermaid seems to think for a moment looking up at you and then turning back to Alohi giving what you assume is her approval. Alohi then turns to you and gestures for you fallow as she begins to make her way out of the cavern with you close behind.
While swimming in the open water Alohi gives you a few lessons on how to better control your body allowing you to better keep up with her. Eventually your arousal once again threatens to overwhelm you forcing you to finger and rub your vulva. Seeing you struggling Alohi swims underneath you giving you a good view of her own pussy before joining you in masturbation giving you good show before swimming on with you following quickly behind now motivated by you lust. The two of you finally arrive at what you assume is your destination as you follow Alohi into a tunnel that leads to a large cavern. The cave floor was covered in what looked like sponges and the walls where decorated in a number of different things that suggested that someone lives hear (is this Alohi's home) you think to your self. Your line of thought is interrupted however as Alohi wraps her arms around your tail and proceeds to part your feminine slit with her tongue sending sparks down your now very long spine. You gently place your hand on your mermaid lover's head pushing her deeper into your pussy as she continues to eat you out her licking growing more and more frantic as she becomes more aroused. Suddenly Alohi pulls herself away from you and starts to vigorously finger her own cunt a look of frustration on her face. From her expression you gather that she is now experiencing a similar lust that you are feeling as you swim over to her wrapping your arms around her waist and begin to lick Alohi's throbbing clit. As you continue to tease the mermaids clit it begins to swell and it starts to slide out soon what you thought was a clit became a long tapered dick.
You feel it throb as you run your tongue up Alohi's tentacle like shaft making her writhe in your arms as you realize that she might be a little inexperienced with this kind of thing. Satisfied with your work you swim up to Alohi's face wrapping your arms around her and give her a kiss as you rub your needy pussy against her cock. Your lover eagerly returns the favor passionately retuning your kiss and thrusting her member against your womanhood desperately trying to gain entry. Seeing her growing frustration you lower your hand to her dick sending a shiver up her spine before guiding her into your wet pussy. A wave of pleasure washes over you as the mermaid thrusts her shaft deep inside your wet confines. Alohi begins to quicken her pace thrusting her cock deeper into you driving you closer to the peek you've been eager to reach ever since your transformation. You continue to kiss and grope your lover as your cunt tightens around her shaft felling it throbbing inside you as she begins to reach her peek as well. At last with one finale thrust Alohi plunges her cock deep into your womanhood causing you both to spill over in ecstasy. Out of instinct you wrap your arms and tail around her holding her close as she pours her seed deep into your womb filling you with a deep sense of satisfaction. The two of you hold each other close bathing in the afterglow for a few minutes before you fell the mermaid's dick once again hardening inside you. Your lust reignited two of you continue to fuck letting Alohi fill you with more of her cum.
Wen both of you are finally satisfied you reluctantly swim away letting Alohi's cock slide out of your pussy leaving a trail of white in your wake. Looking back at the white scaled mermaid you see her penis slide back inside her vulva once again taking the appearance of a clit. After taking a few moments to recover Alohi swims up to you giving you a kiss before pointing up showing you a pocket of air above you. But just as you are about to make your way to the surface she stops you before taking an exaggerated breath and using her hands to indicate something coming out from her gills. You've spent enough time with her to now that she is trying to show you how to transition from breathing water to air and nod to her showing that you understand. Alohi gives you a warm smile before swimming to the surface with you following closely behind. After braking the surface you quickly take in a deep breath of air filling your lungs and pushing the water out thought your gills once you feel them close back up you're finally able to breath the air normally. After taking a few more breaths you swim over to Alohi before kissing her on the cheek "I'm Sarah by the way" you say realizing that you never got the chance to introduce yourself.
"Hello Sarah I suppose your wondering what's happening to you". "Yea why did I just suddenly turn into a mermaid" you ask lifting you gold and green tail out of the water to emphasize your point. "You seem to have had the misfortune of stumbling upon our birthing grounds" she explains "you see mermaids are inherently magical beings so naturally the paces we choose to give birth in end up being infused with magical energy". "You see wen ever a human finds themselves in these paces they start to absorb that energy and if they stay there for to long in the aria... well you already know what happens at this pint". "Okay I guess that makes sense but mmm why did I get so horny" you ask. "Well you see because this is a birthing ground it wasn't gust mermaid energy flowing into you but also maternal" she continues. "Basically wen your body started to absorb that fertile energy it forced your body to ovulate making you go in to heat". "Ovulate wait do you mean I'm..." you trail off as you place a hand over your womb a sacred expression on your face "pregnant"? "I'm sorry" Alohi says concerned "but it's the only way to satisfy the urges brought on by this transformation".
"So do all mermaids have dicks or are you unique are there any mermen" you ask. "Mermen don't exist that's only something you humans came up with" she explains "and yes all mermaids have cocks you likely have one to". "Maybe wen I go in to heat you could knock me up and then we'll be even" she says before giving you another kiss. A little embarrassed by Alohi's suggestion you decide to change the subject "so your a midwife right"? "Ah mid wife" the mermaid asks obviously confused. "Basically its a person who helps a mother wen she's giving birth" you explain. "Oh I suppose that's a part of my duties but to be more specific I'm what's called a Siren". "Sirens you mean the beautiful women of the sea who lure sailors to their doom with their singing" you ask. "So that's what you humans know us as hmm" she says "I guess that is something we used to do but to be more precise Siren is a title given to mermaids who are particularly gifted with magic which we weave using music". "Sirens are typically given the task of protecting places that are considered sacred to our kind like the birthing pool and sometimes this includes other duties like acting as a "midwife" as you put it" she explains. After letting everything that Alohi said sink in you finally build up the courage to ask "is there a way for me to go back to being human again"?