Twilight's time at Fluttershy's cottage had thoroughly exhausted her; she wasn't even sure she wanted to pursue another mare today. So she decided to revisit some of the ponies she had already slept with in the hopes that they could spend some quieter time together.

Or at least take a little bit more time before they fucked each other senseless.

With that in mind, Twilight set out to visit Derpy at her townside hut, hoping she remembered the way after she had left the other night. It was probably for the best; she wanted to prove to the mailmare that she wasn't going to just leave her like her previous partners.

Believing that she had found the correct address, she knocked on the door, hoping that Derpy would be home at least for a little while. Maybe they could just go out for a lunch date if she was really stretched for time. Her thought were cut off by the sound of the front door creaking open, though the pony on the other side certainly wasn't Derpy.

If Twilight didn't know any better, she would've sworn that Derpy had already given birth to their foal and she grew up in a matter of hours. The young unicorn before her wore a lavender coat not unlike her own, and her mane sported a blond just like Derpy's. She was clothed in a very simple outfit, consisting of a white tank top, pale blue jean shorts, and a pair of pink and white sneakers.

She looked up at Twilight with an excited but confused expression before sprinting back into the house shouting "MOM! MOM! YOU WILL NOT BELIEVE WHO'S AT THE DOOR RIGHT NOW!" This confirmed to Twilight that the pony she just encountered was probably Dinky. She knew of her, as Derpy had mentioned her a few times while stopping by the treehouse to drop off any mail that was too cumbersome for dragon delivery, but this was the first time she had actually seen the mare. Derpy did always say she liked to keep to herself.

Another face arriving at the door and jumping to hug her snapped Twilight out of her thoughts. "Oh Twilight, it's so good to see you! I mean, I knew I would see you cause, you know, you live her, but it's so nice to have you at my front door!" Derpy exclaimed before recomposing herself and stepping away from the alicorn. "Oh, um, what can I do for you?"

The pegasus's enthusiasm was both adorable and heartbreaking at the same time, making Twilight very glad she decided to stop by here today. She stepped forward and resumed their embrace, softly comforting the mare in her arms. "I came here to see you, silly. I was wondering if you wanted to spend the afternoon together."

A playful gasp echoed behind them. Twilight glanced over Derpy's shoulder to see Dinky with the most gleeful expression on her face. "Oh. My. GOODNESS! MOM IS GOING OUT WITH PRINCESS TWILIGHT!" She sprinted back into the house. "AMETHYST! GUESS WHAT JUST HAPPENED!"

Twilight and Derpy shared a look with each other before bursting out in fits of laughter.

Derpy collected herself, breathing out a small sigh as she explained, "I'm sorry about that Twilight, she's... very excitable."

"Probably just elated to find out her mother is so happy," Twilight replied as she leaned in and kissed the gray mare.

"Huh. You weren't kidding."

Twilight and Derpy broke apart and turned to find Amethyst and Dinky standing in the doorway, Dinky bouncing in place while Amethyst wore a more neutral expression. "Well, it's nice to see you putting yourself back out there, Mom."

Dinky jumped up to her sister's shoulders and climbed on her back. "Isn't that super exciting?! They're gonna spend the whole afternoon together! Do you know what that means?!" she exclaimed.

Amethyst chuckled at her little sister's enthusiasm. "Yes I do, it means we are leaving them to themselves and going somewhere else," she stated as she gently grabbed Dinky's wrist and started pulling her out into town, ignoring her younger sibling's whines of protest. "Take good care of Mom, okay Princess?"

"I will, I promise. It was nice to see the both of you. I hope you enjoy your day out." Twilight bid the two sisters farewell, watching as they strolled into town before shutting the door and turning back to the mailmare. "So what would you like to do for the rest of my visit?"

Derpy's face glew a subtle shade of pink as she shuffled her feet on the floor. "Well since your here, I, uh, wouldn't mind picking up where we finished off the other night? You know, without me crashing into you?"

Twilight chuckled, her voice dropping to a sensually commanding tone as she approached her lover. "I'm glad you're so enthusiastic. Why don't you show me just how much you want it?"

Derpy slowly nodded and dropped to her knees, reaching up and pulling Twilight's skirt down around her ankles. The alicorn's dick was already standing proud out of the leg hole of her panties, but Derpy removed the garment anyway. She then lifted Twilight's cock and wrapped her other hand around her sack, fondling each ball and gently rolling them in her palm. She began slowly stroking the alicorn's dick, taking her time to feel every veiny pulse through her shaft.

Twilight allowed her a small amount of time to continue her softer foreplay before she gently urged the pegasus to continue further. She didn't expect that this would prompt Derpy to take one of her balls into her mouth and suck on it, but she was hardly going to complain about the sensation. The mailmare rolled her tongue over the soft flesh, her muzzle pressed firmly against the underside of Twilight's cock, every breath she took drawing in more and more of Twilight's scent.

Eventually Derpy pulled away and stood up, lifting her arms and silently offering to Twilight to undress her. The alicorn stepped up behind her and kissed her neck and shoulder as she removed each garment, letting her hands roam over the mare's bare body as she exposed it.

When Twilight had at last peeled away Derpy's panties, she gently bent the mare over against the wall and rested her cock against her ass. "You know, there's something I haven't tried with anypony yet. I'd like for you to be the first."

"Twilight, do you mean...!" She got her answer as Twilight prodded her anus with the tip of her dick. "Okay, just please take it slow. I haven't had anything back there for a while, and not something as big as you are."

"So you have taken it back here before? Interesting," Twilight mused before leaning forward and planting kisses along Derpy's back. "I promise I'll be careful."

She then gently pushed her tip into the tight hole, the walls of Derpy's anus immediately convulsing around the intruder. Derpy let out a loud moan of pleasure as Twilight's penis stretched her sphincter, slowly sinking further in and garnering more mewls and groans from the gray mare. Twilight made sure that she stopped frequently, listening closely in case she went too far or it hurt too much. When she felt the base of her cock contact Derpy's ass, she slowly started pulling herself out, the mailmare's strained squeaks replaced by long moans of relief.

Twilight began a slow rhythm of thrusting, acclimating Derpy to her large member before going any faster. It was almost worth it to slow down just for the sound of Derpy's low sensual grunts and groans, but Twilight wanted to know just how much she'd scream instead. Little by little she picked up her pace, the volume of Derpy's cries escalating in turn.

Before long, Twilight had shifted herself to lean over the pegasus, plunging her cock straight down into her widened asshole. Derpy's voice had grown hoarse from her screams of pleasure as Twilight prepared to shoot her load straight into her ass. She wasn't even sure how many times she had cum at that point; she just knew that another wave was on its way.

Twilight plunged down one last time as her orgasm overtook her. Shot after shot of thick sperm pumped its way down, doing everything it could to fill the space it was emptied into. A small amount came flowing back around Twilight's dick and out of Derpy's anus, dripping down in between her ass and pussy onto the floor.

Twilight had barely pulled herself out from Derpy's gaping asshole when she turned the mailmare over and plunged deep into her pussy, suckling on one side of the gray mare's breasts and grasping onto the other as she vigorously thrust into her. Derpy had almost completely lost her voice by this point, barely able to say anything as her next orgasm overtook her. Derpy's constant gushing over her cock sent Twilight over the edge just as quickly, filling her womb with as much sperm as she had left within her.

The two of them collapsed onto the floor, neither having the strength to pull themselves away. Derpy's pussy softly convulsed around Twilight's dick, still twitching from the mailmare's latest climax and showing no signs of stopping anytime soon. Eventually, Twilight did manage to lift herself up just above Derpy to face her.

"*Huff* So... are you done?"

"... give me a glass of water and five minutes."

Twilight was surprised. "Are you sure? You look pretty worn."

Derpy gently nodded. "Yeah I'm fine. I just need five minutes."

She wasn't lying. The two made love to each other for several hours, moving from the living room up to Derpy's bedroom, all the while Twilight cycling through each of Derpy's holes after every climax. Throughout it all, the alicorn never stopped kissing her lover wherever her lips could reach. By the end of it all, they had ended up splayed across Derpy's bed, Twilight nuzzling the mailmare's breasts and her cock resting against her thighs.

"You know, we'll have to get up to clean up the mess downstairs before your daughters get home."

"Five minutes."

Twilight smirked at the response. "You sure? You look like you're about to fall asleep, and we don't want them to-"

"Five minutes."

Twilight giggled softly and cuddled back in with Derpy. "Okay, five minutes."

Author's Note

So before I had written this chapter, I only had a passing idea of what Dinky looked like. It was absolutely hilarious to find her official design from the show looks like she could've actually been Derpy and Twilight's daughter.

Also I've decided against making Twilight a hermaphrodite as it wouldn't make any sense with the justification for alicorn libido (if she was, she would be experiencing both a desire to breed and to be bred at the same time.) That being said, that doesn't mean she won't ever have a pussy in the future. Magic's a hell of a thing.

Next up, Twilight attempts to revisit another previous lover, but somepony else is there instead...