Mary picked up the doll vial, examining it for a brief second. The liquid inside was a creamy color, not unlike cream soda. The label on it read "Doll (I)". Mary wondered what the "(I)" stood for. Beyond that, it wasn't all that significant, looking just like all of the other vials.
Curious to see its effects, if it even worked, Mary opened her mouth, and drank down the vial's contents. It tasted like really sweet cream soda. She assumed that is was just that- cream soda- and went back to what she was doing beforehand.
Tossing the vial in the trash, she went back into her room, and saw her new blue sundress on her bed. She'd forgotten that she bought it yesterday, and hadn't had a picture of herself in it. She liked to take and post pictures of herself modeling any new outfits she had. Mary changed into the dress, and put on a pair of black 2-inch Mary-Janes she had before going over to her full-body mirror.
Looking herself over, Mary thought her outfit was cute. She took a couple poses, before noticing her skin looked different, specifically around the seams of her sundress and shoes. She got closer to the mirror, and saw that her skin looked like it was made of fabric. Mary started panicking, before remembering she had drank the "Doll" vial. This must be its effects starting.
Mary watched as the fabric spread up her body, feeling very warm and fuzzy as it did so. She saw her fingers merge as her hands became mittens. Her joints smoothed over, becoming nonexistent now. Mary looked up at her face, and saw her features change. First, it overtook her mouth, which became a sewn-in smile. Her nose flattened, and she felt herself stop breathing. The fabric overtook her eyes, and her vision winked out for a brief moment. As it came back in, she saw that her eyes had become green buttons, with three sewn-in eyelashes above each one. The fabric overtook her hair, making each individual hair a piece of string. Her hair styled itself into a pair of pigtails.
Then, a fuzzy warmth started spreading throughout Mary's body as her insides became stuffing, starting at her feet. Her mary-janes became fabric, losing their heel, and sewing themselves into her feet as her bones, muscles, and tendons became fluff. Her feet became more doll-like, becoming flatter, making her ankles disappear. Mary could no longer rotate her feet. It spread up her legs, which lost their definition. She could now no longer bend her knees, either.
The warmth spread up through her chest, and her breasts flattened to her chest. Her sundress sewed itself into her body, and became the same material your skin was as the warmth spread. It spread to her shoulders, and down through her arms, which also lost their definition, and flattened a little. Mary could now no longer bend her elbows, or move her hands anymore.
The warmth finally spread up to her neck and head. They flattened, and became more doll-like. As the warmth spread to the top of her head, Mary felt seems start to sew themselves into her sides, around her waist, and around any seams on her dress and shoes. As her seams finished, she looked herself over, and thought she looked like a life-sized, doll-version of herself.
Mary then noticed that she was shrinking. It was slow, but it was noticeable. After all, she remembered being able to reach the top of her dresser. Deciding to wait it out, she started walking around, finding that as she shrank, her movements became slower.
Finally, when she was only 9 inches tall, Mary stopped shrinking. Her movements were very slow now, and she found that her sense of touch was dulling. Suddenly, Mary lost her sense of balance, and fell over. She attempted to move, but found that she couldn't. Then, the warmth from earlier returned. It felt very nice, and made Mary happy.
Mary's mind started to cloud as the warmth intensified. She found it harder and harder to remember things from before she became a doll. She also started to see herself as a doll now, instead of a woman turned into a doll. Then, Mary knew herself to have always been a doll, forgetting her entire life before becoming a plush doll. She lay there smiling and happy, as the heat became orgasmic, spreading throughout her entire body. She was then put into a state of constant orgasmic bliss, eventually forgetting her name altogether.
Why would she have a name for herself? That was her child's job, was to name her. She was only supposed to be played with, and wasn't supposed to do anything else. She lay there in wait for a little girl to come pick her up and play with her.