You watch as a pair of bumbs appear under your nipples on your normally flat chest. You continue to observe as they grow outward some, eventually rounding up a little bit. Realizing that Sandy was probably trying out the wand's power, you step in the shower to prevent anyone from seeing you changed.
You look down and see that they've grown to a B cup, just big enough to be rounded out and called boobs, but small enough to not turn heads. You jiggle them a little bit before they grow again, slowly reaching DD. You look down at your cleavage, instantly getting a boner. But your horniness is put to the back of your mind as your breasts swell to an F cup, blocking the view of your feet. You squeeze your left nipple a little bit, relishing the sensitivity.
You hold your boobs in both hands, bouncing them up and down a little bit before letting them flop against your chest. You do that a couple of more times, enjoying the feeling of your boobs slapping against you. you stop, however, after a strong surge hits you. You loose your balance for a second as your boobs grow out quickly, passing all H, I, and J cups in a matter of seconds. YOu lean forward a little bit as you take hold of your new breasts, They're practically the size of watermelons. You lean forward a little bit, their weight causing you to do so. Just as you reach for the soap, you feel a lsight rumbling in your breasts along with a strong tingling, and you sit down.
Your breasts shoot out a good dozen cups, making you wonder if you'll be able to stand up. Through sheer force and determination you manage to do so, but you're practically exhausted. You look down at your massive globes, and see that they take up most of the shower. You fee aroudn them, eventualy raching the bottom. You lift your knee up, instantly hitting tit flesh. You feel your boner between your breasts, making you wonder what Sandy will do next.
You grab a bar of soap, but drop it. It lands in between your breasts, instantly slipping around. After a few minutes of messing around, you eventually grab it and clean yourself. You dry off, and take a step out of the shower. You look at yourself in the mirror, your jaw isntantly dropping. Your tits are at knee level, and they're about as big as the room you're in. Remembering that the room was ten feet by ten feet, you can't help but giggle at the thought of Sandy doing this in revenge for his water trick.
You crak open the door to look and listen. Your parents are down in the lving room watching a movie, and your step-sister is standing in the hallway. Once shee sees your boobs, she holds back her laughter and walks over. You quickly explain the situation to her, hoping that since she experienced the power that she would be OK. Luckkily she is, and helps you walk down the hall to your bedroom.
Once inside, she help you place your tits on your bed. She helps you put your pajama pants on, giving your boner a quick squeeze. You turn your head to protest, but she immediately puts a finger over your mouth. She thanks you for the changes you did to her, and that she hopes you change back by morning. She leaves the room, letting you sit there on your bed with massive tits. After a couple of minutes you start tingling again.