Colin awoke to sun shining through his partially open window. He groaned while he rubbed his eyes and sat up in bed. He had had the strangest dream last night but was now having trouble remembering it. He strained his mind for a minute but he got nothing. All he could recall was something about water, which is when he realized that he needed to pee, badly.
He ran into the bathroom and immediately realized his bladder. He sighed in relief as he continued to go when he heard the door swing open. He looked in shock as Jane walked into the bathroom. They both shrieked as Jane shut the door and started yelling at him from the other side.
"Colin you idiot!" She yelled.
"What?!" He asked, still unfortunately going. "How was that my fault?!"
"Well, you uh, didn't lock the door genius!" She struggled to come up with.
Colin just sighed as he finished and grumbled as he washed his hands. His sister was always annoying to him. Sometimes he just wished she'd be nicer to him. As he finished washing his hands his sister barged in looking upset. She practically shoved him out of the bathroom before he could even dry his hands.
"Hey I wasn't finished!" He yelled from beyond the door.
"Oh you're done." She angrily replied. "Ugh! Can you at least drop the freaking toilet seat?!"
Colin just snickered. "What am I, a girl?"
Surprisingly, from inside the door, came a muffled, monotone "yes" and suddenly Colin found himself back in the bathroom.
He had to blink a few times and was puzzled as to why he was suddenly in there but his train of thought was soon derailed as soon as he looked at the mirror. What he saw wasn't his own reflection, but rather that of some girl his age. The closer he looked, the more he realized she looked like she could be his twin sister. Her hair was wavy and brown like his but past her shoulder, she had similar freckles, eye colour, and even clothing, but still obviously a girl.
All the clothing was girlified and she had breasts, the womanly figure, and a butt that was too big for Colin's liking. He just stood there baffled, just beginning to realize that he had actually turned into a girl as he felt the void in his pants. Just then, Colin heard a sound from next to him, he turned and saw Jane peacefully peeing while browsing on her phone.
"Uh, Jane?" Colin asked meekly, surprised by his newly feminine voice.
Jane looked up and smiled. "What is it Coleen?" She happily asked.
Colin just stood there stunned as he replied "nothing" and quickly slipped out of the bathroom. He stood in the hall beginning to grasp what had happened. He turned to see a family portrait with the girl he had become taking his place in the picture and wearing a dress that matched Jane's. Colin knew what had happened. The whole world changed, and he think he knew what caused it...