You watch in disbelief as, unbeknownst to her, Lisa's boobs shrink. Down to a B-cup, then an A, and finally they disappear completely.
'Oh well, she still has a nice ass.' You think, but then a strange feeling makes you look down. In horror, you realise that the feeling is of your own A-cup breasts pressing against the seat belt. Quickly they balloon out until they were an exact replica of Lisa's.
Then you begin to wonder why they aren't turning you on like usual. Looking across, you see an unusual bulge in Lisa's tight pants. Unable to see past your breasts now, you slip a hand down your pants and gasp as your finger brushes against a very sensitive womanhood.
"Just relax." A deep voice says from the drivers seat. Looking across, you see your own face staring back at you. Without looking in the side-view mirror, you know that you have Lisa's.
The two of you sit in silence for the remainder of the trip. You are scared of Lisa now, knowing she could do anything she wanted and you wouldn't be strong enough to stop her. Also because you figured she had something to do with this.
When the car stops in front of the cabin, you get out and almost fall over as you discover you're wearing heels. "What the hell?" You hear Lisa's voice come out of your mouth, looking down your realise that you and Lisa have swapped clothes as well. You can feel the bra supporting your breasts, and you now wore a short miniskirt and white blouse. It was her work suit.
Clearing her throat, Lisa grabs you attention and begins to speak...