The cloud floor beneath us was damp with sweat and other fluids as I relentlessly pounded into Rainbow Dash's tight marehood from behind, her vivid rainbow mane grasped firmly in my hands. Her cyan wings were splayed out and quivering with each powerful thrust, feathers ruffling in pleasure.
"Oh Celestia! Anon you're gonna break me!" Rainbow moaned, her tongue lolling out of the side of her mouth.
I chuckled, leaning down to nip and suck at the base of her wings, eliciting a shriek from the pegasus. "But you love being broken by this human cock don't you?" 
She whimpered and nodded, pushing her plump flank back against me, taking me to the hilt. "Yes! Pound me! Break your little rainbow!"
I grunted, grip tightening on her mane and hips, really railing into her now at a brutal pace only a human could manage. The wet slaps of our joining echoed through the open room of her cloud home.
Her wings started to spasm and her hind legs began to quake as she climaxed for what must have been the 10th time that night. I felt her marehood clench down and ripple along my length, trying in vain to milk me of my seed.
Not yet. I was intent on really wearing my little pony out tonight. 
She went limp under me for a few moments, chest heaving with breaths and tongue lolling freely from her mouth before I started moving again, slow long strokes that made her whine.
"No more...I can't...too much..." Rainbow panted, though she made no real effort to get away, thoroughly trapped under my heavier human body.
I shushed her, running my hands through her mane and over her back in a soothing manner even as I built the pace back up. "Shh, I know you've got a few more in you Dashie. Just relax and feel."
Her only response was a long keen as I plunged back into her sensitive depths...

I leaned down, wrapping my arms under Dash's belly and hauling her up so her back was pressed to my chest, her hind legs dangling on either side of my thighs as I knelt behind her. She gasped at the new position, trembling in my grip.
"Look at this view," I purred in her ear, gesturing with my chin at the open balcony doors leading out from her bedroom. All of Cloudsdale was laid out before us, lit up in the night.
Rainbow shuddered, leaning her head back against my shoulder, teeth gritted. "Anon, ponies could see us!"
I nipped the point of her ear, chuckling. "Let them watch. Let them see what happens to naughty pegasi who tease humans."
I started moving again, bouncing Rainbow on my cock with her hind legs suspended. Her wings shot open, flapping erratically, as broken moans and cries spilled from her mouth at a volume sure to disturb any late night cloud walkers. 
"Your flank was made to be pounded." I grunted, delivering a sharp smack to one of the cyan cheeks, watching it jiggle. "So thick and firm, perfect for a human to grab onto while he rides his little pony all night long." 
"YES!" Rainbow wailed, forehooves scrabbling at the air. "Ride me! Break me! Use your little rainbow pony!" Her dirty talk spurred me on as I pummeled up into her without mercy.
The sound of our flesh meeting was drowned out only by her screams of pleasure and the wet squelch of her arousal. I gnawed and sucked a vibrant mark into the side of her neck, feeling her pulse hammer wildly under my lips.
When I felt her start to tighten around me again, I let go of her belly, letting her drop forward onto her forehooves. I draped myself over her back, rutting fast and hard to chase my own end now as Rainbow climaxed, her wings beating against my sides. 
With a roar, I slammed home one final time, burying myself to the hilt as my release finally hit. Rainbow whimpered, legs buckling out from under her, only staying upright due to my weight on her back. My seed pumped into her in thick spurts, her sensitive canal rippling along my throbbing length, milking me for all I had.
Panting, I carefully withdrew and flopped onto my side on the damp cloud floor next to my spent pegasus. Rainbow let out a long groan, cheek squished against the floor. I chuckled breathlessly, pulling her against my chest and nuzzling my face into her mane. She was definitely going to be feeling this tomorrow...

I woke slowly the next morning, the familiar scent of ozone and rainbows greeting me. Rainbow Dash was sprawled half on top of me, face nuzzled into my neck and snoring softly. I smiled, running my fingers through her messy mane.
Last night had been intense, even for us. Dash was definitely going to need to take it easy today. I carefully shifted out from under her, tucking a pillow under her head. She mumbled something in her sleep, wings fluttering.
Those wings were sensitive in all the right ways. I stroked along the top edge of one, leaning down to kiss the joint where wing met body. Rainbow's eyes blinked open with a groan.
"Morning sleepyhead." I greeted her with a smile. She grimaced.
"Anon, did you have to go so rough last night?" She whined, though the grin she was fighting said otherwise. "I can barely move my hind legs!"
I chuckled, massaging her lower back and flanks gently, mindful of any lingering soreness. "Don't pretend you didn't love every second of it Dashie. The way you were screaming my name for all of Cloudsdale to hear..." 
She burrowed her burning face into the pillow with a whimper at the memory. "Okay, okay, you're right. Totally worth it." A pause and then a saucy look over her shoulder. "Wanna go again?"
I barked out a laugh, giving her flank a light swat. "You insatiable little mare. Give yourself time to recover first." My tone turned more serious. "I don't ever want to actually hurt you Dash."
She sighed, rolling onto her back so she could meet my eyes, wings splaying out on either side of her. "I know Anon. I trust you. I just can't help wanting more of you. You're like a drug."
I leaned down, kissing her slowly and softly. "I love you Rainbow Dash." I said against her lips.
She smiled, nuzzling into the kiss, anxiety eased. "I love you too." Her eyes turned mischievous again. "Now how about breakfast in bed? I could use some energy for later."
I snorted, climbing out of the nest of clouds that served as her bed. "You're hopeless." But I couldn't hide my own smirk. "One breakfast coming right up, and then you're taking a hot bath missy. Doctor's orders."
Rainbow stuck her tongue out at me but didn't argue. Chuckling to myself, I headed out of the bedroom and toward the kitchen. I really was the luckiest human in Equestria. 

I hummed to myself as I worked in Rainbow Dash's small kitchen, whisking a bowl of pancake batter and keeping an eye on the sizzling strip of hay bacon. Dash had a major sweet tooth, especially for chocolate chip pancakes, so I made sure to add extra chips to the batter.
Once the pancakes and bacon were done and arranged nicely on a tray with a glass of orange juice and some syrup, I headed back into the bedroom. Rainbow was still dozing, though she lifted her head at the scent of food.
"Breakfast is served, your highness." I announced, setting the tray over her lap. 
She licked her lips, eying the stack hungrily. "Chocolate chip?" At my nod she dove in with gusto, making pleased little noises at the taste. I sat beside her on the bed, watching in amusement.
With Rainbow Dash, the way to her heart was definitely through her stomach. She plowed through the entire stack of pancakes and most of the bacon before pushing the tray aside with a satisfied sigh, licking syrup from her lips.
"So good." She patted her belly, grinning over at me. "You're gonna make me fat at this rate Anon."
I raised a brow, glancing pointedly over her athletic cyan body. "I don't think you have to worry about that Dash. All the flying and training you do, you've got the metabolism of a hummingbird."
She stuck her tongue out at me before catching sight of the remaining strip of bacon on her tray. Her eyes lit up and she made a lunge for it but I snatched it up first, waving it in front of her nose teasingly.
"Ah ah, this is for being such a good patient." I held it up over her head as she made grabs for it, laughing.
"Anon, c'mon!" She whined, wings snapping open to try and lift her up to get it but she winced, still sore from our earlier activities.
I felt a little bad for teasing her and lowered my hand, letting her pluck the bacon from my fingers with her mouth. "You really should be taking it easy today Dash." I said, brushing her mane from her eyes.
She sighed, chewing on the bacon strip. "I know, I know. I'll be good, promise." To prove her point she grabbed the empty tray and set it aside before flopping back against the pillows.
I smiled, leaning down to kiss the tip of her nose. "That's my good little Dashie. Now, how about that hot bath I promised you?"
Her eyes lit up at the suggestion and she nodded. "Only if you join me." She batted her lashes coyly.
I pretended to consider. "Well, I suppose I am still dirty from last night too..."
"Then it's settled!" She started to climb out of bed but winced again at the movement. I chuckled, scooping her up in my arms instead and carrying her bridal style into the bathroom. Her protests about not needing to be babied were half hearted at best.
Time for some tender loving care. Rainbow Dash really was completely hopeless...but she was all mine. 

I carried Rainbow into the spacious bathroom of her cloudominium, setting her down on a plush bath mat. "Alright, you just relax while I run us a bath Dashie." I turned on the taps in her large tub, testing the water to make sure it was nice and hot before plugging the drain. While the tub filled I lit some scented candles around the room, hoping the lavender scent would be soothing.
Rainbow watched me move around with half lidded eyes, sighing in pleasure as the hot water began to soak into her sore muscles. I poured in some bubble bath once the tub was halfway full, filling the room with the scent of lavender and vanilla.
Once it was full I turned off the taps and climbed into the tub, beckoning for Rainbow to join me. She stood up slowly, shaking out her wings with care before climbing in after me. I helped guide her into a seated position between my legs, her back resting against my chest. She let out a long, contented sigh as the hot water lapped around her body, wings splaying out and sending bubbles dancing across the surface of the bath.
"This is just what I needed." Rainbow murmured, eyes slipping closed in bliss. I wrapped my arms around her waist under the water, massaging her lower belly gently.
"I thought a nice hot soak would help relax you after last night." I placed a soft kiss on the back of her neck, smiling against her skin.
"Mhm, best idea ever." She sighed, leaning back into my touch, tension visibly seeping from her body.
We sat in a comfortable silence for a while, just enjoying the chance to relax in each other's embrace. The only sounds were our breathing and the occasional splash of water and pop of bubbles. I took my time massaging Rainbow's wings, eliciting small whimpers of pleasure from her as I loosened cramped muscles and smoothed feathers.
She started to doze in my arms, lulled by the warmth and my ministrations. I chuckled softly, nudging her back to wakefulness. "As much as I'd love to have you fall asleep on me Dash, you should actually bathe while we're in here."
She blinked awake with a yawn, sitting up a bit. "Huh? Oh right, bath. Got distracted." She grinned sheepishly over her shoulder at me.
I shook my head in amusement, grabbing a washcloth, some shampoo and a bar of soap. "Alright you, time to get clean." I started gently washing her back and wings, taking extra care around any areas that still seemed sore. 
Rainbow purred, going pliant under my hands. "Best. Coltfriend. Ever." She declared, craning her neck for an upside down kiss.
I obliged her, smiling against her lips. "Just doing my job as chief nurse and bath attendant to a stubborn little pegasus." I teased, earning myself a splash of water to the face. Rainbow's melodic laughter filled the bathroom, soothing any sting from her splash.
It really was the little moments like this that made life with my rainbow maned pony all the more sweet. I wouldn't trade a single second of it for the world.