Tiffany thought about it for a while. Then she said since you support me so much, your my bra.
Katie could only let out a gasp before the changes started.
Her clothes disappeared while all her openings sealed up. Her arms turned into straps and bent behind her connecting with a clasp. Her head split in half and changed into straps as well and they connected into what use to be her arms. While that was going on she was shrinking and flattening and her legs molded together. Her torso and legs continued until they formed into 2 cups.
Tiffany squealed with delight as she picked Katie up and undressed to try her on.
Katie still able to see, hear, and feel watched in horror as Tiffany undressed and put her on and could feel Tiffany's breasts that she now supports.
Tiffany loves it but looks out her window to see its getting dark outside and decides to go to sleep for school tomorrow thinking how nice it will be to wear her new bra and see if her powers work on anyone else.
As Tiffany through Katie into her dresser and went too bed Katie could only scream as she tried comprehending what would happen to her and if Tiffany will ever change her back.