You decided to ignore your gut feeling for now and try to use the watch on Jamie again. She was now lying on your living room's sofa, you pointed the watch towards her and, slowly, started adjusting its time forward, hoping that she wouldn't notice you. Immediately, she started to feel strange, a very unusal tingling slowly overwhelming her senses, her body began to change.
Her breasts started spilling out of her once fitting bra, her hips, slowly, but noticeably, started widening, she seemed to be slowly taking more and more space on the couch as she started getting taller and her clothes became a bit tighter on her body.
Jamie looked confused, shocked and amazed at the same time, she couldn't believe what was happening to her, she felt her body changing, her breasts becoming fuller, her long legs stretching out, and her height increasing, she couldn't help but scream as she saw her body grow and mature before her very eyes, her clothes struggled to contain her new curves, her breasts strained against her shirt, her jeans hugged her curves and her shoes rubbed against her swollen feet.
When Jamie finally stood up, you could clearly tell that she towered over you now, especially considering that you were looking up at her. She was now five foot eight, a full four inches taller than you, and she had grown into a beautiful young woman. Her clothes were stretched to their limits, revealing her new figure in all its glory. Her shirt was tight across her chest, showing off her newly formed cleavage, while her jeans hugged her curvy hips and thighs.
Jamie quickly hid her look of surprise as she noticed your presence, with a grin, she walked towards you, a confident smile spread across her lips. "Well, well, well, little brother," she taunted, reaching down and ruffling your hair playfully. "Looks like you're the one who needs to catch up now."
You stared in disbelief as she unclasped her now way-too-tight bra "how did this even happen?" she asked "i've heard of big growth spurts but growing 8 inches in half an hour is just... impossible."