Your 18 Year Old Step-Sister, Jessica

You have changed sexes, now bearing nice sized breasts, a narrow waistline, but a nice butt. The yellow shorts you're now wearing accent the shape of your legs and thighs, as well as prove you don't have male genitalia from the tight fit. The pink shirt added to the outfit makes you think of Easter, but you know your sister has worn similar during many parts of the year.

You briefly check under your shirt, and notice that the amulet is still embedded in your chest, but now a bit higher to accommodate your new bosom. You can even see that you're wearing a bra under your shirt, which is something you forgot about when you were imagining your sister's body.

Now that you look just like your sister, you should figure out what to do. I would be interesting to see how she would react to seeing herself. Then, you know you could get away with getting her in trouble with your mom, without much effort at all.