Because Attraction…

"Those pills taste yucky but make my mind feel so fuzzy and funny! Like i can barely remember what i just thought of... uhmm.... AAaahh there's the tingling in my booby boobies again!" She was given experimental growth hormones on accident as they were meant for his girlfriend, but after seeing the effects on her he just couldn't stop himself from giving her a second, and making it a pattern... The pills came with a special recording to 'make the transformation complete' as you could hear people moan and a monotone voice telling her how to be a good girl for her big brother... Hearing her clothes creak again as her eyes rolled back again, hearing the voice tell her to take the next step as she locked the door and approached her brother while taking off her top slowly...