You go to her, and try to knock her out gently, but it does nothing. She just gets mad at you and kicks her out of her room, and slams the door. Now you could not test your power. Then you remember that your mom did laundry today. So you walk downstairs, and it turns out that she just finished folding the cloths for everyone. You tell her that you can do bring the clothes upstairs for her, and she says thank-you. You then bring the everyone's clothes, expect your's and her's. When you get to your room, you put all your clothes away, but then also put one of Melisa's outfits to. You took one of her bras, a pair of panties, a t-shirt that was a little revealing, and then a skirt. You then take the rest of her clothes, and you leave them on your sisters bed, for her to put away.
Now your run to your room. There her outfit is waiting for you. You start with her bra. You struggle latching it in place, but once it is on, you see your chest inflate. They kept inflating, until you had a pair of B cup breast on you. This was amazing. Following your initial transformation you start to put on her panties. Seconds later, you are greeted by your sister vagina. This felt weird, but cool at the same time. You had her breast, and her vagina, but you did not have her legs or arms, or torso to match.
You kept putting on her clothes. You had her t-shirt, and skirt, and this gave you her relatively thin waist compared to yours. The t-shirt showed some of that cleavage from your new breast, and the skirt gave you her thin, and hairless legs. This was so cool. But now you ran into another problem. You had her body, but not her head, or her feet.
So you walk out of your room, and get to her room. You gentle open the door, being careful as to make sure no one sees your head and feet on your sister's body. When you open the door, you see your sister facing the wall on the opposite side of the room while texting on her phone. You then see a pair a sandal heels right next to you by the door, so you grab them. Then you see a hat in the corner of her room, so you gently sneak in grab the hat.
Back in your room, you put on the hat, and as soon as you do your hair grows longer, and you face begins to shrink a little. As you spoke in amazement, you realized you had her voice now. Now you grabbed the sandal heels you stole. You slid them onto you giant feet, and as you did your feet began to shrink. You tried to stand up, only to realize how difficult it was to stand up.
Now you were your sister completely, you even had her memories now. This was awesome. You could be anyone now. But what will you do with your power now?