"Now, I'll just put this key here, and you can see if you can be a good filly for the week." The words came back to her, again and again. Her master had caught her masturbating, after he had told her not to, and now she was locked in this enchanted chastity belt and no amount of rubbing could get her off.

It had been simple at first, she had sat on her bed, reading a book, avoiding thinking about anything naughty. An itch had come, growing worse for every minute she didn't scratch it. Turning, she looked up at the wall, seeing the poster. "Good fillies do not masturbate. Well, I am a good filly and I can prove to you, Master, that I am!" She grinned and stuck her snout back into the book, the growing need between her back legs easily relegated to background noise.

By the time the mare fell asleep there was a damp patch on the bed.

"I'm Pancake!" She jerked awake, lifting her head up and in doing so throwing the book across the room. "What's that… that sm… oh…" She flopped back onto the bed, the ache between her legs now too much to ignore. Smiling at the effort her Master went to, she slid a hoof back, tracing her belly, only to find cold, wet, metal. "What?"

She looked back between her legs, spotting the chastity belt. "This isn't fair! Master, I just wanted a little fun!" Her complaints yielded no help, of course; her master was away for a week. "A whole week! I can't go a day without a little rubbing, a quick clop…" Her eyes were drawn up to the wall, where the sign was.

Good fillies do not masturbate

Something glinted in the morning light, something that hadn't been there when her Master had left, something that hadn't been there when she went to sleep. A key hung from a hook above the poster, just out of reach. "I love you Master…" She got to her hooves, her back legs wobbling with the need that was crushing her trapped slit. She practically waddled over to the side of the room where the key was. Eyes twinkling, she reared up on her back legs and promptly collapsed to her plot with a clunk. "Hey!"

She tried again, picking herself up and reaching up as high as she could but, again, her back legs betrayed her. "Master, this is just being mean!" She stomped around in a circle, feeling angry and upset. "The stool!" Her tail arched up high as she trotted over and braced her head behind the low foot-rest. Pushing forward, she slid it across the room, the ache in her nethers fading with the sure knowledge that she would soon be free to clop the day away.

The stool thumped into the wall and she straightened up. Blushing brightly, she climbed up and reached, stretched, her fore-hoof just barely shy of the key. "A little more…" She bumped the key just as her back legs gave out and, as she hit the floor again, so did the key. "Yay!"

Rolled onto her back, the mare was careful to line up the key, push it in the little hole on the belt. She started to turn it and it… kinda did. The ache between her legs got worse, she whimpered and squirmed on her back, her rear legs kicking feebly as the magic of the enchanted lock reacted to the wrong key being used. She squirmed and twisted, losing all sense of time until a hoof pressed to her snout. "Little pet, you tried to cheat?"

The mare looked up, her eyes glazed over, it was her Master, but she couldn't even think, let alone talk.

"You still have five more days, pet, but here, let me get the paddle." He used his horn to retrieve the black paddle he used only when his filly had done something naughty. "I think twenty should be enough."

Author's Note

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Awesome ponies who are already helping to keep me in keyboards and rum:
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