One thing that irritated Abigail was her age. Even if her cursed brother wasn't in the way, Arthur didn't see her as anything other than a little girl. Arthur was meant to be hers, but he could see it because of a silly 5 year age gap. But now she was going to fix it. But she wasn't going to simply make herself the same age as Arthur. As much as she adored him, she could still feel a little vindictive towards him. "Let's see how you like being 5 years younger than your crush," said Abigail, setting her age from 10 to 20.
Pretty soon, Abigail felt her whole body getting bigger. For a moment, Abigail was worried she was going to grow out of her clothes. But she soon saw that her clothes were changing to fit her body. One of the first changes was her training bra fully changing into a proper bra. Abigail grew several inches as she went through the remainder of her tween years. When Abigail turned 12, she felt a sudden tingle between her legs. The tingle persisted and increased as she turned 13. "I guess this is the start of puberty," she said, the word popping into her head. She soon realized she understood a lot more than she did a few seconds before. Her brain was growing up with her body.
As Abigail started going through her teen years, she was definitely showing she was an early bloomer. Her height kept increasing, sometimes in short intense bursts. Her athletic figure became more obvious as her remaining baby fat melted away. Soon more womanly features became obvious. Her upper legs were starting to swell into pleasing curves. Her hips were growing wider to accommodate them. Abigail twisted her body around to look at her butt. She had to move her hair to one side to look at it. Her butt was definitely swelling out into an inviting shape, make her waist look slimmer in comparison. Her shorts were getting even shorter to show off her developing womanhood
But the biggest area of growth was undoubtedly her breasts. Already have gotten a head start as an early bloomer, they kept growing larger and rounder. Her shirt was slowly forming into a crop top to better show off the tops of her globes and the increasing valley of cleavage between them. Abigail squeezed her breasts and gave a low moan. "Oh god..." she moaned, her deepening voice sounding a lot more like her mother's as she used one of the phrases she commonly used.
Abigail took off her shirt and bra to take a proper look at her growing breasts. They were large C cups very close to becoming D cups. She played with her nipples again, sending more pleasurable tingles through her body. The tingle in her groin intensified until she felt the front of her shorts getting wet as well. Abigail took her shorts and panties off, revealing a small patch of hair around her moist pussy. The 16 year old traced the edges of her lower lips with one finger before hesitatingly inserting one finger in. She let out another moan as a new source of pleasure was discovered. One finger became two then three as she became more confident. Abigail's other hand was squeezing and teasing one of her giant tits as she fingered herself. "Oh fuck..." she moaned as her pleasure grew higher. The meaning of that word became clear to her along with many other naughty words. And with them came the knowledge of where babies came from and the act of sex. She could soon imagine herself fucking an older version of Arthur, his cock going deeper in her to plant his seed. Before long, Abigail hit her climax with a grunt, her hand become wet with pussy juice.
Abigail gasped a bit as her heart rate went down. Looking around, she went over to the mirror in Jeff's room and looked at her 20-year old self. She had definitely blossomed into a lovely young woman. Her face no longer showed a childish roundness, but a mature beauty, particularly with her pouting lips and her dark hair that had grown down to her ass. Her breasts were definitely her most prominent feature. They looked to be D cups, maybe even DD. But her body still retained her athletic figure. In fact, it was a bit more pronounced with the toned lines on her stomach, arms, and legs. Her hips had widened out for proper childbearing. And her ass was pleasantly plump without being overbearing. Overall, Abigail had matured into a sexy and beautiful woman with her bright green eyes the only obvious sign of who she really was.
After posing naked in the mirror for a minute, Abigail put her clothes on. She found that they were completely dry her sexual excitement threatening to make them damp again. Her new crop top and short shorts displayed her adult body very well. Abigail grinned at herself in the mirror and said in her new mature voice, "Arthur, you have no idea what's about to hit you. Or what's about to hit Jeff."