Haley didn't feel anything for the first few seconds. After about ten, she felt multiple sensations all at once.
She felt her hair get longer as her face changed slightly. Her nose got smaller and her lips got fuller and darker. Her torso got longer as her tummy shrinked and made an hourglass shape. All the baby fat went straight into her breasts, which got bigger and bigger until they reached large C cups, almost D's. Her areole got larger and her nipples got errect, and since she wasn't wearing a bra, her nipples were visible through her t-shirt fabric.
Her arms got long and slender as her nails grew out and became dark red. The changes then spread to her lower half as her hips grew outwards and her bum got larger and pushed her shorts out considerably. Her small panties quickly were enveloped by her cheeks and became a thong. Her legs got taller and her feet got larger. She quickly had to remove her shoes before they got suck in them.
She noticed the transformation was done and looked at the new person staring at her in the mirror. She was hot! Haley decided that she should begin to know this body better, so she took off her incredibly tight clothes and studied her nude form.
She cupped her C cups and noticed that they could fill her whole hand. She moved some hair out of her face and looked at her new vagina. "So..." she said, "this is what a sixteen-year-old female genitalia looks like!" She noticed her pubic hair, first and formost, and then began to notice the folds of her pussy. She studied it in the mirror and curiously put a finger in it. 'It was so sensitive', she thought. She took a finger and probed it inside her hole. She was enthralled with the sensation that followed. She took her digit out and started putting in and out faster and faster. She then decided to take her other hand and squeeze her new tits while she did it. She rubbed her already-hard nipples and started putting her right in her mouth, suckling her tits like the baby she was 6 years ago.
She did this for about ten minutes until she heard a knock at her door. "Hailey? Sweetie, it's dad!" he said. Hailey's face froze in horror. She forgot about her father and he was about to come in on nude, sweaty, not-to-mention-now-sixteen-year-old daughter!