Tammy walked over to another rack and grabbed a pair of panties exactly like Bill's.
As in, "down to the color and size" exactly.
She strolled back over to Bill watching his butt sway from side to side.
She was unaware of the fact that she just tossed her pants to the side and swapped her panties out.
And just like Bill's, Tammy's butt swelled up big and round.
"Find anything?" Tammy asked.
Bill spun around, his booty swaying as he told her "No."
The two paused when they looked over their shoulders at a jewelry mirror.
"Holy shit, your ass is huge." Bill said as he cupped Tammy's heaving cheek.
"Speak for yourself, bubble butt." Tammy said, smacking Bill's ass and watching it jiggle.
The two moaned loudly right in the middle of the store.
Suddenly, they smiled and cupped their own asses like prized trophies.
"Man, the boys are gonna love this." Tammy said as she rubbed her ass.
"I feel you." Bill said as he fondled his own booty, "Guys will be all over us."
"Wait, what did I just say?!" they asked out loud.
Tammy turned around and looked down, jumping back.
"What?" Bill asked.
He looked down and realized his bulge was gone, and sticking his hand in his panties revealed that he was a she now.
"What happened to us?!" Tammy asked.
"I don't know, but I'm straightening this out!" Bill said.
The two headed for the register when they suddenly froze in front of a lipstick display.
"I can't move!" Bill said.
"What the hell is happening?!" Tammy said.
They lost control of their arms, grabbing two tubes of violet lipstick and coating their lips on the spot.
Before they could react, their lips plumped up to a, alluring pout and Bill's adam's apple disappeared.
The two shared a kiss, cupping eachother's asses playfully.
"That's better." Bill said in a feminine tone.
"I know right." Tammy smiled, "Now come on, we need some more stuff."
The two strutted through the store, swaying their hips to hear their ass cheeks smacking together as they continued to become...