Bob was still admiring her form when his reverie was interrupted by Emma handing her the pyjamas.

While Magda was dressing, Bob turned next to the older daughter. "Your turn now my dear," he said firmly.

The girl's head suddenly shot up. "What?" she said in surprise.

"Stand." Bob said in his usual laconic style.

"Nooooo," wailed the girl, and started rocking on the edge of the bench.

This time Magda spoke up, "Just do as they say, Kasia," she coaxed.

"But but but..." stammered Kasia, still rocking and crying.

Emma, having had enough of this nonsense, stepped forward. She grabbed Kasia by the ponytail, lifting her bodily from the bench. Kasia screamed a little scream and struggled, kicking out with her legs.

"Hey!" Magda yelled in protest, before a sharp look from Emma made her remember herself. "Okay, just do as they say," she sighed.

Kasia relented and stood quietly against the target, sulkily avoiding eye contact. Then the humiliating process that her mother had endured was repeated.

"You're a pretty one. Now strip," Emma demanded.

Slowly Kasia took off a pink fleece, a snug fitting white polo shirt, sports bra, leggings and finally knickers, and put them next to her mother's clothes on the bench.

Bob could feel both her teenage embarrassment, as her young cheeks flushed at this impromptu strip-tease, and the still growing bulge in his pants.

Again he looked her up and down. His eyes were drawn to her feet first, which were self consciously turned in towards each other. Bob thought this was rather sexy and girly. He raised his eyes to take in the rest of her teenage form. Her legs were really nicely muscled; slim of course, but lithe and toned too. "Do you do sports?"

"She's in the school gymnastics team," Magda chipped in.

Bob grunted approvingly. Fit girls were surely the most fun. Strength and stamina were desirable qualities in this game. Maybe it'd be fun to slowly squeeze the life from this vivacious soul while the others watched.

Kasia had a perfect little pussy too, it was clear that the girl had already started shaving.

Above that, a flat, gymnastically toned stomach. The smooth ripples of her ribcage allowed Bob to visualise the physical structure below and imagine the gore-fest that it would yield later.

"Smashing body," he commented.

"Yah, probably will later," replied Emma, with a far-away look in her eyes.

Bob estimated that Kasia's still developing breasts were a C-cup already, but with that pretty aquiline smoothness that swimmers' have.

Kasia felt Bob's gaze, and her Slavic face suddenly looked up at him. Her pretty lips parted as if to say something, but only her pleading hazel eyes spoke.

Bob thought her fearful, tear-stained face was a stunningly beautiful mask of vulnerability. He was sure they'd see that look again when they were enjoying their carnally destructive fun with her later. The thought caused his cock to pulse and strain against his pants, signalling a sense of urgency to the proceedings. but Bob wanted to see a little more before he moved on.

"Gymnastics right? Cool. Show us what you got then."

Realising she had no choice, but still crippled with embarrassment, Kasia turned around to avoid eye contact. This suited the couple just fine of course, giving them a fresh view.

Kasia's back was as nice as the front. Bob watched as subtle musculature and bone slid under perfect taught skin as she moved through a little routine.

First came some warm up stretches. Then, lying face down on the floor, arching her back and bending her knees, she reached back and grabbed her ankles. Bob watched mesmerized, as her toned ass muscles pushed her butt proud. It was a great look, and Emma thoughtfully grabbed more photos.

Then, a handstand with splits. The look of shock on Magda's face was priceless, as Kasia's pussy was fully exposed to all. The final act was a graceful forward walkover, showing maximum flexibility, and again not leaving anything to the imagination.

Bob exhaled in appreciation. It wasn't just the overt display that did it for him, it was little things like the swishing of her ponytail as she moved. Visceral sexuality belied by a girly innocence.

At last Emma threw her jammies to her and Kasia hastily put them on, thankful to be free at last of Bob and Emma's unwelcome and searching study.

Kasia (15) 32C-22-32 1.55m 47kg