Amy smiles and then starts to strip in front of you. Amy has always liked you, but she was always that good friend who was a girl. You were even fuck buddies when she lost a lot of weight, but she didn't want to be exclusive. Now she's older, 30, and hangs around a younger friend, Jessica, 24. Amy is naked in front of you, not a hair on her except her scalp. She turns around and shows you every curve, and beams proudly, "Fully waxed and bleached. You like?"
You sigh slowly, but also nod approvingly. "Yes Amy, very nice," you add.
Your naked and hard as you watch her put that devil tail butt plug into her ass. She teases it slowly, watching and maximizing the anticipation for you. It's big for her, so it takes here a little time, then she sighs deeply as it slides into her. Amy unpacks your costume onto her sofa, and hands you the full neck rubberized waterpolo suit. "These go on very slowly...so you don't rip them," Amy offers, a former water polo player herself.
You sigh, and slowly take the suit. Amy helps you by unzipping the back of the suit. You spend the next thirty minutes inching and pausing, inching and pausing, the suit until you stand up and let Amy zip the back of the suit, again she has to pull the zip together, and inch up the zipper. Once the zipper is at the top, you don't dare move. Just breathing takes effort. If this was a woman's medium, it must have been for a girl. The suit was extremely tight. Your shallow breaths were as deep as you wanted to breath in case you rip the suit open.
"Wow," Amy whispers, "your a statue....your stretching that suit so much, nothing is hidden. You've got to see what you look like."
You look at Amy and shake your head no, but she tugs on your arm, and you make short steps into her bedroom to stand in front of the full length mirror on the back of her bedroom door. You both stare at each other, as you notice the spade tail swishing and moving randomly as Amy stands still, her gaze at your chest, now showing a very pert D cup pair of breasts. Moments later, you forget all about wearing a super tight swimsuit, as you freak out about the large tits on your chest, because you feel your rock hard nipples digging into the supertight suit. Amy excuses herself and you take the opportunity while your alone to touch your nipples, then reach down to your ...yep, still there and rock hard. Amy returns with the tail skirt and fin, handing both to you, "Still more pieces," she adds while showing you her rather revealing bodysuit she is about to put on.
The wetsuit tail skirt slides on rather quickly, especially when you lean all the way back on Amy's bed. This time was also different, as you were not sweating with the tail pulled all the way up. Compared to the suit, the tail skirt was comfortable, the tightness at the changing room was not to be found. You also found you could breath deeply and you no longer felt as if the suit was stretched so tight that it would rip apart, mostly because the super compression from earlier was almost gone. For the first time, you slide your feet, now being held heel to heel, into the large tail fin. One problem from the changing room though, not being able to stand, was still present. You missed Amy putting on her bodysuit while you were trying to stand with your tail skirt and fin.
Amy smiles as she walks over to the bed, you seemingly helpless to stand. "Why don't you just lie back, you don't need to run away now. We can have our own fun right now." Amy sits down next to you and strokes your mer-crotch, since you don't have legs or feet showing anymore. You don't resist as you relax onto her bed, as Amy scratches an itch you didn't know you had. Between your legs starts to throb, as you feel your cock about to explode. Amy knows you well, and you don't last long as your orgasm overtakes your entire body. Amy works her fingers deep inside you as you throb in wave after wave of orgasm. Your mind is lost in time as the fog of lurching your waist into Amy's hand for more and the magic of her touch keeps you in orgasm for many waves.
Minutes later, you open your eyes, "That was incredible....I was on edge for so long, it felt like multiple orgasms," you whisper weakly.
Amy smiles, "We both have costumes from the same shop. They are quite magical." Amy climbs on top of you and you smile. The strappy bodysuit really accentuates her curves and her breasts. Your already throbbing between your legs when you feel a warmth slide slowly into you. You can only exhale slowly, craving to be filled by the warmth. You thrust your hips upward to get more into you, then Amy gives a disapproving pinch on your left nipple, "Now now...patience." Amy hits all the way into you and slowly thrusts her hips up and down into you, "Now....that's better." You want to ask what's going on, what's happening, but your mind is filled with give me more, fill me, fuck me. You last longer than Amy, who shoots her load into you as you still feel your orgasm building. You can feel her throbbing cock put pressure right at a certain spot each time she thrusts into you. She takes care in giving a slow, firm thrust when her cock head is in that area. Just after you get a second wave of orgasm, Amy goes limp on top of you, and is asleep. You chase your orgasm as best you can, by squeezing her cock deep inside you, but your not a skilled sex machine, and soon your orgasm fades and a soft cock remains inside you, the throbbing goodness now just a pleasant memory. You push Amy off to your right side onto the bed, sorry to feel her cock leave you. Sitting up, you can see you have a gaping mermaid vagina and asshole. Your tail no longer looks like it did on the hanger, but is now real scales, and with that the unpleasant realization that your drying out. You try to wake up Amy...but she is out. You reach down to your tail fin to try to slip it off. It takes some work, but the tail fin separates from the tail skirt and you have feet again, and with that the fish skin becomes neoprene again. You take off the tail skirt, only to realize you still have a vagina as the cameltoe shows in the swimsuit, large D cup breasts with thick nipples, and now your worried.
"No .. no .. no .. no ..." you mutter to yourself staring at your slime covered legs and shiny swimsuit with firm breasts pushing outward into the now tight fabric. Your vagina throbs for attention, as your new body has needs, and once again you look over to the cock between Amy's legs and a hunger for having that inside you is now firmly established.