Amy smiled and shook her head. "It's okay, Mum. To be honest, I'm kind of glad I know. You always acted so strange at times that I could tell you where hiding something. And I completely understand why you couldn't tell us. I promise I won't breath a word of this. Your secret's safe with me."
Jane wiped tears out of her eyes and smiled. "What did I do to have such an incredible daughter."
The two embraced and Amy helped her mother out of the tub and dry off. Jane's tail turned from scales to skin and split in two. Her feet and bones reformed and she was left as if nothing had happened. She got dressed and went with Amy to check on the kids as she heard her husband pulling into the drive.
The rest of the day was pretty uneventful. Jane cooked dinner, they all ate in the dining room as they always do and then it was time to put the young ones to bed and snuggle up on the couch to watch TV. It started around eight, when Amy developed a headache. She took some aspirin to cure it but that did nothing. If anything, it made it worse. By nine, it was a full blown migraine and she excused herself to bed to try and sleep it off. She brushed her teeth, changed into a t-shirt and panties and got into bed. Sleep evaded her as the throbbing pain in her head kept her awake and she was beginning to sweat. Jane checked on her at ten, on her way to bed and said she was running a fever. She told Amy to take some medicine and come get her if she needs to. Amy took her advice and took some flu medicine. It made her drowsy enough to get some sleep but she was awake again at 10 to midnight.
Amy tossed and turned in her bed, but she still felt awful. She had thrown off the covers as she was unbelievably hot but she continued to sweat buckets. Amy finally sat up and rubbed her throbbing head. She considered waking Mum but glanced at the time and decided against it. No-one would appreciate being woken at 11.57 at night. She hoped out of bed and tiptoed out her room and down the stairs. She went into the kitchen and turned on the light to get herself a drink of water. She dipped her hand in and rubbed some on her brow. That soothed her migraine a little but it was still near unbearable. She downed the glass and lent against the counter, breathing heavily. As she stood there with her eyes closed, the clock on the cooker click to 00:00. Midnight.
"Ah!". Amy opened her eyes and looked down at her legs. There was a strange stinging sensation running through them. She thought it might be pins and needles but as she attempted to rub them better, they only got worse. Weirdly enough, the worse the stinging got, the better her migraine felt. A more painful sting shot through her legs and Amy had to put her hand on the counter to keep herself upright. Amy was worried before but now she was getting scared. She straightened up and began to walk towards the stairs to get Mum. As she walked, she lost feeling in her legs and this was when she fell. Catching herself before she head-butted the floor, Amy looked over her shoulder and down her body to see what had caused her to trip. She gasped at the sight that awaited her. Her feet no longer looked like feet. As she watched the bones dissolved and the toes webbed together. Amy flipped over on to her back and sat up, her arms holding her up. "What's happening to me?!" Amy whispered as she watched the last remains of her feet disappear as the flat pieces of flesh began to widen. A new pain hit her legs and Amy let out a pained gasp. She felt her legs begin to roughen and small discs began to push up through her skin. She tried to pull one and felt it tug at her skin. "Oh God, oh God, what is this?!" If her legs weren't enough, jolts of pain crossed her chest and she began to feel a weight building in her breasts. With every jolt they expanded until they had gone up a cup size or two. She glanced at her legs and saw more of the discs had appeared all the way up her legs, which seemed to be darkening to a shade of purple. Suddenly it hit her, the feet flat and spread out wide, the legs becoming rough and changing colour, her expanding breasts. She had seen the same thing when she had come home that afternoon, when she found her mum turning into a-
Amy's hands flew to her mouth to stop herself from screaming. Whatever had happened to her mum was now happening to her. For some reason, she too was turning into a mermaid. She looked down at her legs and saw that none of her skin remained. The scales shone purple in the kitchen light and the same purple colour continued along her now semi-transparent feet. Or fin, as it now was. There was only one part of the transformation left. Her legs began to gravitate towards each other, some ancient magic wanting them to come together. She threw her hands in between her legs and held them apart, trying to fight the change. She pushed hard to keep them apart but it was only a minor delay as she felt her strength weakening and her legs slowly moving towards each other. "No, no, no, please, no." Amy muttered prayers and begs, as her arms began to shake. She tried to will the change to stop, tried imagining herself with legs in the hopes it would reverse it. But her efforts were in vain as eventually her legs got closer until her fins touched. They were the first to fuse together as the change travelled up her legs reaching her ankles then her knees. Amy continued to try and pull them apart but she knew that it was hopeless as the fusion approached her groin. In that moment, she remembered she was still wearing her panties. For a brief second she hoped they may slow the transformation but this wasn't the case as they were ripped apart without putting up much of a fight.
As the fusion of her legs was completed, she was hit with a wave of pain that forced to lie on her back as the bones in her body reformed to her new appendage. Gradually the pain faded and then was gone altogether, leaving Amy exhausted and frightened. The feeling returned to her lower body but it felt alien to her. She sat up again and stared at her new form. Her enlarged breasts pushed at her t-shirt, exposing her midriff. Amy placed a shaky hand above her naval and felt her normal human skin. She then moved it downwards, feeling as bumps began to appear growing larger and larger and watching as the colour darkened until they were fully sized purple scales. She tried to move her legs and her tail responded, flopping up in a motion that human legs could not have accomplished. Amy's hands went to her mouth again. She felt her shoulders begin to shake, her eyes watering, quiet whimpers escaping through her fingers. Finally, she placed her face in her palms and cried.