As Faye reached the top of the stairs she saw Mary enter one of the other rooms and close the door behind her.
"Huh, wonder where she's going. Hopefully she left the box." Faye tuned the corner and looked into the bedroom and saw the box sitting on the bed where she left it. As she bent over to enter the bedroom, she felt her shirt stretch and finally tear on her back.
"Damn I'm getting big," Faye straightened up and nearly hit her head on the ceiling. By her estimate, she was around 7'2" when her growth stopped. Her shirt was torn down the back, her pants were in tatters, her bra long since broken and hanging beneath her shirt, and her panties clinging to her like a second skin. Faye fished her ruined bra underneath her shirt and giggled at the thought that the rest of her clothes soon joining it.
Tossing the bra aside, Faye got an idea and quietly shut the bedroom door and locked it. "Don't want the stick-in-the-mud ruining my fun. Now what to choose, what to choose. Oh, I know something I definitely want to try, hehehe."
Faye reached into the box and retrieved the Male vial. "Maybe if I just have a- wait what's this?" Faye noticed a seam on one of the sides and tried to part it lightly and saw the box open even more, showing even more vials and even more importantly; a set of instructions.
'Pour desired vial into mixing beaker with specific body part to achieve desired results. Breast grow+multiply=more breasts added. Amount added is proportional to the amount of each vial added. WARNING:Over use could lead to permanent problems.'
Faye pondered this revelation for a moment before she pulled the drawer out further, much further than what should have been in the box.
"Well that makes sense that the box is also magic if the vials are as well. Let's see if I can do what I want to."