Prelude: My step-brother went from skinny to buff overnight. He casually told everyone he was working out, but I knew something was up. I snuck into his bedroom to find a steroid cream which promised "insta-growth." At school he's become a whole new person, popular with the ladies, he's went from benched football player to quarterback, and he's considering different scholarship offers! My step-brother is large and in charge, and it's not fair.. if a certain part of me grew I'd be just as popular, and I yearn to be admired by the handsome guys in our school. I'm invisible. They only have eyes for the girls with large breasts. Something needs to change!
My step-brother is in his room, playing video games instead of studying.. his teachers fawn over him now that he's so buff and hot. I come in and start to negotiate with him. He acts like he doesn't know what I'm talking about, and tries to lie to me, I have to insist that he shares some of his precious steroid cream with me, if he doesn't, I'll tell his coach. If he is tested for steroids he'll lose everything, the team, the scholarships, and his fame. He begrudgingly gives me the cream and I happily skip to the bathroom to test the product on my breasts.
I start to rub it into my my breasts. The tingly feeling makes my heart race, the hairs on the back of my neck stand up, and I feel curiously wet between my legs. I generously add more as my lips softly moan. My step-brother knocks on the door, he's worried I am using too much of his precious cream, "go away," I tell him. I add more, focus on my eyes in the mirror and my breasts throb, my legs feel weak, my step-brother knocks more, "you're only supposed to use 3 grams of the cream," he adds in a worried voice, "that's about the size of a pea, Lyra, are you paying attention?" I ignore him. I feel as if I'm going to cum from the tremendous feeling the cream gives my entire body, sensual, exciting, and **BANG, BANG, BANG!** My step-brother is pounding on the door with his fists and it turns off my mood.
I see that my breasts haven't grown a bit and I hurry to get dressed. I suppose testosterone cream will only work if you're a guy. I am buttoning my jacket and I feel a pang in my stomach that nearly doubles me over, the pain quickly dissipates and I look in the mirror as my breasts throb and fill. They're filling before my eyes. I can see my breasts fill from A-C, stretching the fabric of my jacket and blouse. The buttons pop off my jacket, and the sensual feeling returns to my body. My blouse is stretching over my heavy tits, grow, grow, growing, and my eyes are wide in excitement. I start to feel concerned when they pass a DD cup size, and worry that my breasts will explode? I used too much of the cream? The more I grow, the hotter I look, but I will have the biggest breasts of any woman in the world! "Will guys love my new looks?" I'll ask my step-brother what he thinks..