Jessie peeked out of her room. The clean laundry was sitting on the landing, where her mother would leave it for Jessie and her siblings to put away. Neither of her brothers were around, probably hanging out with friends or playing. Jessie snuck out the door and down the steps to rifle though the stacks of folded clothes. She had put hers away earlier, but her little brother's clothes and her big brother's clothes were still there.
Jessie debated whose clothes to swipe, but if it were something her brothers liked, they may come looking for it, and that could get awkward. She could always claim she picked it up with her clothes by mistake, but given her relative neatness compared to the boys, it might not be believable. That's when Jessie had a ridiculous idea...but it would be hilarious to try. She would swipe her older brother's boxers.
Jessie managed to get back to her room with her ill-gotten loot without anyone noticing. She quickly locked the door and began to slide off her shirt, before she had another brainwave. If she removed all her clothes and put on her brother's, that might turn her into him, but then what could she do? Just sit in her room in her brother's boxers? That would be weird, even for her. But what if...
Since the ring instructions said that the wearer would automatically fit the clothes, what if Jessie only changed one article of clothing? Wouldn't that mean the rest of the clothes were hers, and only the part with the other clothes would change? Well, if magic existed at all, and actually operated according to logic...
Laughing at her own absurdity, Jessie pulled on her long socks, then only removed her panties from under her skirt. Then, taking a breath, she pulled on her brother's boxers under the skirt, her eyes shut in anticipation. And she felt...nothing. No tingling, no zap, nothing. Disappointed, Jessie opened her eyes to look in the mirror, seeing her same old reflection, but then she noticed something.
There, under her skirt, a slight bulge. Lifting up her skirt, Jessie stared at the front of the boxers. There was definitely something in there that wasn't before. Raising a hesitant finger, Jessie poked it...and drew in a sharp breath.
"Uh-oh..." she breathed out in disbelief.