"Ladies, let me in. It's me, Dr. Grant." the geneticist said from the other side of the door. The girls went and straightened the room up. Hiding the arousal from what they had done as best they could, they opened up for Mona's dad.
"H-Hey there Doc!" Cailin nervously said.
"Why'd you come here?" Rachel asked.
"Because of this." Dr. Grant said as he lifted up a tablet and pushed a play icon. It showed the two a video of them making out moments ago. The girls froze in fear.
"No, no! This is good! This is something I've been waiting for!" the Doctor exclaimed, "Now I can obtain some pheromone!"
"Pheremone?" Cailin asked.
"Yes. You see, I've been watching you two the whole time, I can tell you two are attracted to eachother! Bear in mind now, the injection protects your mind, but you still have the body of a bimbo! And when two bimbos.... er, seek eachother's company... it's because they're drawn to pheromones they secrete when no males are around!" Dr. Grant lectured like this for another ten minutes.
Cailin and Rachel glanced at eachother with a blush across their faces. Did they really have bimbo instincts? It might have been... Cailin had an obvious reason to have the hots for Rachel, but why did Rachel have the hots for her?
"Get to the point, Doctor!" Morton said, breaking everyone's train of thought.
"Oh, yes, sorry..." Dr. Grant said, "Anyway, we need you to come to the training hall for a little workout so we can get some of your pheromone."
A workout? That was all?
"Wear anything that will get you girls to sweat like pigs." Morton bluntly said. "Loads of drinking water will be provided. Don't worry about being the only ones involved here: Miss Jamie and Miss Mei were caught frenching eachother in a bathroom stall."
"Alright." the girls said as the men walked out for them to change.
Cailin pealed off the tank top exposing her boobs as they jiggled out. Rachel's breasts jiggled in the same way, and her butt bounced around more than ever as she swiftly pulled her pants off, the panties she wore getting wedged in her butt crack. A red light blinked at the sight.
"PRIVACY!" the girls yelled, covering their nude nipples as Cailin tossed her bra at the hidden camera.
They emerged twenty minutes later, wearing form fitting sports bras and athletic panties, covered up by baggy sweatpants and sweat shirts. Their new sneakers shone as they walked up to the doctor and CDC man.
"Okay, we're ready." the two said in sync.
The girls blushed in embarrassment as they walked off to the training hall.