Katie the life model

Katie tried to duck behind Gail as the door opened, but the principal stepped to the side, exposing the naked girl to the new arrival.

"Oh, yes, she'll be perfect," the art teacher surmised. "It's so refreshing to hear young people embracing their nudity!"

What?! Katie was getting a horrible feeling in the pit of her rumbling stomach that had nothing to do with her hunger.

"Katie is a budding exhibitonist, and she has told me she wants to go into a career of life modelling," Gail lied.

"Well, now seems like as good a time as any to start!" the art teacher beamed. "Come here, Katie. Drop your arms, you don't need to be shy."

Doing as she was asked, Katie stiffened as the art teacher poked and prodded her, cupped her breasts, and placed a hand on her buttocks.

"Your boyfriend is a very lucky man."

"Katie is single, actually," Gail interjected. "In fact, she's never even kissed a boy."

Katie looked at her, mortified and furious. Why would she share such personal information about her?!

"Really?" the artist teacher replied, intrigued. "That's nothing to be ashamed about, Katie, everyone develops at their own pace. It's nice that you're saving yourself for the right person."

The brunette whimpered as the teacher gently poked her stomach, swollen due to her bladder being at capacity.

"I think we may need to make a stop before the class starts," she laughed, putting an arm around Katie's shoulder and guiding her from the room.

"Not so fast!" Katie wheezed, waddling awkwardly, doing her utmost not to let the dam burst.

"It's really not healthy to go this long without visiting the bathroom, Katie!" the teacher informed her.

Katie's brain was far too fried to formulate a response. She was still coming to terms with the fact that she had forcibly been signed up to be a life model, and had once again been **** to walk the halls of the school stark naked. Didn't they usually offer life models robes to wear? At least the halls were deserted; Katie didn't know how she'd cope if she was seen totally bare and **** for the toilet by her classmates as they headed home.

"Quickly, then," the teacher chivvied her as Katie sank onto a toilet after they reached a bathroom.

Katie had been hoping to earn some privacy at long last. Instead, the art teacher stood in the open doorway of the cubicle, watching the nude girl as she noisily emptied her bladder. Leaning back, Katie let out a relieved moan, cupping her breasts and closing her eyes in mortification as the stream kept going...and going, and going.

After what felt like an age, it finally subsided. Keeping one arm across her chest, Katie awkwardly cleaned herself one-handed.

"Wow, you really were full!" the teacher laughed as Katie washed and dried her hands. "Let's go, your artists are waiting."

xxx

Katie fidgeted awkwardly as the teacher fixed her makeup.

The class was gradually filling up behind her; chatting amongst themselves, and throwing only the occasional glance in Katie's direction. She supposed seeing a naked woman in this setting wasn't a novelty to them.

"Please can I have a robe?" Katie asked, shivering.

"Don't be silly, you'll only have to take it off in a few minutes, anyway."

Once everyone was settled, and the model was prepared, the teacher started the class.

"Welcome to tonight's class. A bit of a change of plan for this evening; Katie is a student at the school, and has kindly volunteered to be a life model. She's only 18 and is a little shy, as this is her first time doing it, so let's make her all feel welcome!"

"There's nothing to be ashamed about, Katie," an old woman called out from behind her easel once the applause had stopped. "You should be proud of your supple young body. I'm looking forward to painting you."

Her stomach rumbled as Katie was moved into the first posture.

It was going to be a long few hours...