"Mom, you're lactating on my fur again!"

"As if that's just me. I told you to milk your teats more often."

Fluttershy and Posey were the first to climb into their new bed. Custom-built, it had space to comfortably fit four adult ponies, and a frame that allowed said ponies to romp about to their hearts content.

Posey had quickly developed her own favorite sleeping position, resting on her side, face to face with her daughter for some deep goodnight kisses. Their huge, round bellies shared the space between them, their popped-out belly buttons poking each other. The expecting mother and grandmother loved feeling her grandfoals inside her daughter moving around right next to her own foals, as if they were already playing with each other through their bellies.

Further below their crotchboobs were squished together, already full of milk and leaking into each other's yellow coat. Posey had already been a well-endowed mare, her first two pregnancies having given her an advantage in the size department. In contrast the change on Fluttershy was far more impressive, her milkers now being many times the size they were just a few short months ago. Gone were the flat mounds her brother had lamented, replaced by supple mammaries, always filled with sloshing milk, nipples hard and leaky wherever she went. Her husband made generous use of them, Zephyr always happy to buck her between her teats before blowing on her belly, getting a tasty drink from them afterwards.

Said stallion was next to crawl on the bed, coming up behind his mother as her big spoon, covering her flank with a green feathery wing.

"Finally, mommy missed you inside."

Posey cooed before her eyes widened, her son slipping his entire member up her plothole.

"Buck mom, you are the best cocksleeve."

He replied, before a playful squeeze by his mother's ponut made him bite his lip.

Last to join them was Gentle, spooning his daughter in a similar fashion before ramming his own member up her tailhole, grinning at the eep he elicited from her.

Acting as their studs cocksleeves had been Posey's idea. The individual pairings were changed frequently, but she made sure their cocks were always hard and ready should the opportunity for another foal strike. A positive side effect was the insane stamina they quickly acquired, with Zephyr's and Gentle's dicks being hard for hours on end as her and Fluttershy's ponuts could withstand any abuse.

Content, Posey wished her family and her soon to be family a good night before resting her head next to Shy's, their breaths mixing as their embracing stallions were slowly grinding their hips against them, already sound asleep.

Author's Note

This was a lot of fun to write. A and family story had been on my mind for a long time and I'm glad I finally got it out of my system.
Thanks again to Shakespearicles and the Incest is Wincest group for hosting the No Shame November contest. This story was my third ever attempt, and the first finished one, at writing horsewords in any substantial way, and I was only able to actually make it because of the looming deadline.
If you have any feedback, good or bad, feel free to leave it below, I could definitely use it.