A week later it rained heavily. Derpy and Cloudfire were stuck inside, staring at the water dripping down her bedroom window. They were bored. It was their day off, and they had nothing to do. Dinky, Mom, and Dad were all at the movies, leaving the two sleepyheads at home. They'd go their own way once the rain let up, Cloudfire thought, and was debating in his mind where. Perhaps some place they'd yet to be on a date... maybe one of parks they'd cleaned up.

In the meantime, Cloudfire would entertain Derpy and kill some time. He had been showing her some fun random things a pony can do with a piece of twine. She seemed enthralled. He showed her Cat's Cradle, Jacob's Ladder, and of course how to tie some really strong knots.

He looked up periodically to make sure he still had her attention... Derpy's eyes were fixed on him the whole time, focused and seldom blinking. There was a smile on her face that made him think she was feeling a bit inquisitive. He waited for a question, figuring it would be about how he was doing one of the basic tricks he'd shown her. She said nothing... just stared.

"What is it, Derpy?" He finally asked.

"Cloudfire..." she murmered. "Remember when you told me knowing my body was really important?"

"Yeah." He smirked, setting down the string, already knowing what he was getting into. "What about it?"

"Can you be here with me... please?"

"No problem."

Derpy was now quiet, blushing. After a few seconds, he went to pick up the string thinking that was going to be it, when she asked him another question:

"Can I try something now?"

He set the string down, replying:

"If you'd like."

The Pegasus found herself in a very familiar position with Cloudfire laying beside her. Seeing how Derpy and Cloudfire had only been snuggling since their first time, she felt... ready for this again.

Derpy ran her hoof over various parts of her anatomy, with Cloudfire giving appropriate names when asked. She was already -somewhat- familiar with a few names from having a talk with her parents years ago when her body started maturing and doing what normal mare's bodies do. She didn't know much, but she wanted to understand. With Cloudfire present she explored.

At first it felt like it was too much again, and Derpy didn't like it... but Cloudfire insisted:

"It's okay, Derpy... Trust me."

She shuttered initially, but bared with it... he was there and that was enough... the warm look in his eyes trumped the overload. He helped her, gently, having different ideas in mind... different ways of touching that he shared. Gentle ways. He didn't put a hoof on her the whole time. After a little exploring and adjusting, the rubbing started feeling good. After a minute he noticed a slightly glazed look in her eyes as she began zoning out...

"Tell me, Derpy," he said, soothingly. "So far what do you like to think about as you're doing this?"

She slowed down a bit, looking up at him:

"Brain goes everywhere! But... it's kinda icky what I'm thinking of."

"What is it?" He asked, with a smirk. "I'm sure I've heard worse..."

"I kinda... like thinking of your backside. It's cute."

She turned crimson and stopped rubbing altogether.

Cloudfire got up off the bed and turned away from her, looking over his shoulder and flicking his tail in her direction.

"What, this?" He asked, smiling back at her. "Is this what you're picturing?"

Derpy looked like she was going to have a nose bleed. His muscular backside was fully exposed and facing her. She nodded, and went back to rubbing the sensitive spot between her legs, focusing on the real thing. He took a step backwards, towards the bed and looked down at her free hoof... she took the cue and shyly put said hoof directly on his rump as he flexed it.

Cloudfire stood perfectly still, his bottom facing her, his tail flicking every once and a while. He watched Derpy's reaction over his shoulder -- he watched her face as her eyes narrowed once more into those tiny slits. Maybe 2 minutes later Derpy's thighs started twitching and her stomach started rippling... her head going further back. He knew it was close... She cried out, her body pulling forward, almost contorting into a ball... then relaxing entirely.

"Good job..." He said, turning towards her and giving her a loving nuzzle.

Derpy hardly heard him. She just panted, looking up into his eyes and smiling.

Cloudfire laid down beside her and snuggled up.

"You did that all by yourself, dear. Just... relax and enjoy the good feelings."