The car bumped to a halt.
"Shit," Maria said to Mark, "What do we do now?"
As they heard the car door open they quickly struggled to shrug back into their clothes. As it slammed to, Mark had managed to get into his black and white CKs and was just buttoning his shirt over his toned torso. Maria had managed to clasp her blouse over her shoulders and tug her tiny skirt over her luxurious hips, but the zipper was still undone.
They both froze at the sound of Miss Wilmsey's voice.
"Now what on earth have we here," she exclaimed.
Despite looking slightly shocked, the woman most of the 17 year old guys agreed was the one hotty on the staff ran her eyes over the contours of Mark's tanned body.
Chuckling to herself she reached into the back of the truck and picked up Mark's trousers. "What are these doing here?"
Playing with the zipper, moving it up and down quickly, she said "These can't be big enough for a grown-boy like you?" She had a sly grin on her face.
The two new lovers just sat in embarassed silence at their teacher carrying on like this.
"Come on you two," she said, "it's not like I don't know what you've been up to. You think I didn't enjoy watching you plowing that meat into her sexy curves in the rear-view mirror on the way back? You young gusy really ought to be more aware. Now, I won't be telling no-one what you've both been up to if you do me one favour each....does that sound fair?"
Mark and Maria, even with her new-found sexy bolshiness, both nodded in shock.
"Right, firsly, what has prim-and-proper Maria done to get such a stud? And I want the truth."
Nervously, because she was unsure of exactly what had happened herself, Maria explained the story.
"That is fascinating," Miss Wilmsey murmured, "Thank you Maria."
"Now, Mark. Your turn. Take the spray, spray it over Maria, and wish that she was as sexy as you are."
Mark was terrified of Miss Wilmsey and had had a massive crush on her ever since he saw her practising her swimming in the school pool one day wearing just a tiny bikini bottom. As such he followed her orders precisely.
Slowly, Maria's sexy body broadened and expanded, her hips becoming chunkier, a bulge developing in her tiny black panties and her chest becoming much smaller but firmer. Her cute features stayed cute but became more chiseled and her arms firmed up and developed distinct contours. The buttons popped off her tniy white blouse one by one and the zipper on the little mini-skirt split as her legs bulked up and the hairs begain to shimmer in the sunlight.
Mark drew in breath quickly when he saw what had happened. Maria had become Mark: that was how 'she' was as sexy.
Miss Wilmsey chuckled. "Now Little Mark and Littler Mark. You must know I have loved that body and that grin. Now is my turn to have it. Neither of you can leave in the current state you're in..."