Amy decided that one more pearl should do the trick. She grabbed another daintily between two claws and popping it in her mouth before swallowing.
Still in the afterglow of her orgasm, the tingles started to return as the third pearl started its effects.
She slipped her webbed hand back down to her womanhood again, finding her ministrations even more rewarding than before.
Her legs went slightly numb for a moment while a fresh swarm of blue scales rushed up her calves, stopping near her knees. Some of the scales on each leg darkened to black, looking like the start of a smooth, curving pattern. The yellow coloration on her fins grew, encompassing almost the entirety of her membranes apart from the edges, which turned black and connected with the dark pattern on her calves. The yellow slid up the surface of her feet, stopping where it met the royal blue scales.
Her legs began pulsing and tightening below her fishy skin, the numbness fading as shapely muscle pumped up on her thighs and calves. Her bones groaned and ached as her legs grew longer by around seven inches. Coupled with her new muscle tone, they looked sleek and sexy.
The scales on her hands crept further along too, the blue coloration growing sparse and stopping midway up her forearms. The tips of her fingers darkened in color, turning almost back before transitioning back to royal blue along her first knuckle. The webbing between her fingers starting lightening, gaining the same yellow coloration as her feet now had. Like her legs, fresh muscle tone wound along her arms, and they stretch another two inches in length.
Her hand was working almost feverishly now, the fantasy of her and Lina alone in the grotto returning with full force.
Her hips ached, and Amy felt pressure forming within them. She held her breath, pausing her masturbation before letting out as gasp as the pressure release her pelvis widened, pulling her legs slightly apart. A pooling sensation filled her ass, and she felt herself pushed up as her rear firmed and expanded with smooth muscle.
God, it was all so hot. Thought Amy. Why does pussy feel so weird? She looked down and spread her legs, seeing discoloration on her lips and clit....
Amy's hand was resting limply against her throbbing snatch, but she looked down as a fresh wave of tingles washed through her loins. Her vaginal lips were darkening to a deep blue, almost black, while the area around it grew a patch of royal blue scales. She felt the feeling of change slide up into her, and Amy clenched her free hand against the side of the tub. Biting the edge of her mouth, she used her other hand and parted her sensitive lips, noting the bright yellow coloring the inside of her vagina had taken.
The sensation of change crept up her core. Her abs tightened and grew stronger, while blue scales formed around the gills on her sides. Her torso stretched two inches longer as her other muscles firmed up, giving her the physique of a strong swimmer. Her nipples grew harder and larger, their color turning that familiar near-black blue coloration, while a small patch of royal blue scales ringed her dark areolas. The pooling sensation returned, this time in her breasts, beneath her blue nipples, the flesh formed and rose, going from A-cups to perky B's.
The tone of stretching rubber sounded, and the shape of Amy's ears began to alter. The tips grew pointed, stretching longer as blue scales washed over them. Two more points expanded from the middle and bottom of each ear. Blue webbing formed between these protrusions, darkening along the edges. She felt them with her free hand and smirked even more as they wriggled by her will.
Right as she climaxed for a second time, she suddenly gasped, her eyes shooting open as they too changed. Her pupils dilated, expanding into the space of her irises and beyond, not stopping until the black coloration filled most of her sclera. Yellow and blue scales formed around her eyes, forming the facsimile of eyeshadow.
Her lips, locked in an 'O' shape as her body was wracked with pleasure, darkened to a deep blue color while the tips of her teeth sharpened slightly. The small gills on her neck flushed blue with the arrival of scales of their own. Her thick black hair shrank back to rest at shoulder length, and a royal blue streak slid down one side.
Amy breathed heavily, basking in the feeling of another orgasm. She reaches next to the box of pearls, picking up a small beauty mirror she'd placed to look at herself. She took in her new lips and eyes before rubbed her hands along her new ears and feeling the cartilage shift, as the fin then flattened itself against the side of her head.
Any looked on in awe as all she could say was "I'm a fish woman..."