The fireflies served as guides for the three girls as they walked down the stone path.
“How much longer?” Trixie asked from the back

“Almost there!” Twilight said in a happy voice, striding ahead surprising quick considering she was currently full term with a healthy sized foal

“Good, good. Trixie is tired of walking”

“So where are we headed again?” Glimmer asked walking alongside the fecund alicorn

“You’ll see”

A few minutes later, the path finally reached a clearing at the base of the mountains near Ponyville
“Ta dah!” Twilight said as she struck a pose as best she could while pointing to a steaming pool of water

“What’s this?

“A hot spring! Zecora told me about it and I figured we could use it to unwind after the week!”

“Uhh, none of us brought swimsuits, Twilight”

“Oh, that’s ok!” and without any further prompting, Twilight started stripping down in front of them

“What are doing!? What if someone else is up here!?”

“Relax, Starlight. No one else knows about this place. We have it all to ourselves!”

At that, Trixie just looked over, shrugged, and followed suit with Glimmer not far behind.
“Our foal is filling you out nicely” Trixie purred as she reached over and rubbed Twilight’s taunt belly.

“Yes, they’re nice and healthy. But I think you should carry the next one” she said with a pat on the belly.”

The azure mare grimaced
“Trixie doesn’t want to lose her figure” she said as she looked down

“Oh we’ve been over this, sweetie. If I can do it, so can you!”

The large mare slowly lowered herself in the water, moaning as her sore legs and feet submerged 
“I needed this…”

For a few minutes, the three lounged in silence as they enjoyed the natural bath
Twilight finally broke the silence
“Now, there’s one other reason I brought us out her”

“Yeah?” Glimmer quipped

“You see, you’ve helped me and Trixie so much setting up the baby’s room. And Trixie, you’ve put up with my demands over this pregnancy. So I want to return the favors for both of you”

“How?”

“By giving you two the chance to “destress” with eachother”

“Each-“

“-other?”

“Yes! You two deserve so much, and since I’m not in the best state to repay you two, I figured you two could service the other!”

The two mares stared at the other for a moment before turning their attention back on Twilight
“Are you sure, Twilight?”

“Yes! Now go on!

Glimmer looked over to Trixie “Well…I guess I’ll start” And at that, she suddenly locked lips with Trixie. The blue mare stared ahead in shock for a moment before a moan escaped her throat and sank a bit in the water. Not wanting to lose momentum, Glimmer began to guide a hand down the side of Trixie’s neck all the way down to her hips.

“She’s right, you know? Pregnancy would look good on you too”

“I told you, Trixie doesn’t want to lose her-NEEE!” she was cut off as Starlight reached and fondled inside her nether.

“Think about it, you’ve watched you wife grow over the months. You’ve enjoyed it, haven’t you?”

“W-well maybe”

“And the next time around, you’d get the experience it!” she started fiddling with one of the dark blue areolas

“The swelling breasts, the be-“
Glimmer’s daydreaming was cut off by a sharp hiss from Twilight. She was leaned back against the rocks and massaging the side of her belly.
“Someone giving you trouble?”

“Oh sorry, my water just broke” Twilight answered a calm tone like she was just telling someone the time of day

Glimmer immediately ceased her ministrations on Trixie and snapped around
“What!?” Trixie was only slightly out of her sex induced stupor and hadn’t yet register the gravity of the situation.

“We need to get you back to Ponyville!”

“Oh don’t mind me, I’ve been having Braxton Hicks contractions all day today”, she said nonchalantly 

“You knew this was going to happen and STILL came out here!?”

“Why do you think I picked the hot springs? My books on foaling say that a water birth can be relaxing for the mother”. She readjusted herself in the water

“Now keep going! Don’t stop on my account!”

“Are you sure?”

“Yes!” 

“Uhhh…”

Glimmer turned back around to Trixie, who was still abit dazed, shrugged, and reapplied her fingers back into Trixie. The Azure mare squealed as Glimmer located her sweetspot. The whole while she kept taking glances back at Twilight. The laboring mare was completely calm, her belly slowly rising and falling over the water as she regulated her breathing. Nervous, Glimmer leaned into Trixie’s ear

“Sorry, but we gotta speed this up”

And with that, she doubled her efforts on her spot and the clitoris. Trixie, suffering a bit of sensory over load, started squirming in the pool and her horn started to glow.

“Almost there, annnnd-“ on her que, Trixie singled her orgasm as jets of light and streamers shot out of her horn into the night in a display akin to a fireworks show. Starlight Glimmer than turned to face back at Twilight

“Ok, now, we’re going to handle that foal”

“No need, I got it covered!” and out of the blue, Twilight cried out as her belly undulated. Before anyone could react, there was a sudden bulge in her nethers, followed by a healthy sized filly being ejected out and into the water.

Glimmer just stared slack jawed

It wasn’t until now that Trixie finally registered what was happening
“How the heck did you do that!?”

“Oh, I read about it in a book” Twilight said calmly as she scoped up the crying child and brought it to her bosom.

“How to birth a foal in less than 30 seconds?” Glimmer said in shocked

“Pretty much! It’s just a matter of breathing and time your pushes right”

Trixie hurriedly swam over to her wife and newborn daughter. There was a silence for a moment as she observed the purple filly nursing off her mother

“…she’s…she’s so beautiful”

“Just like you”

“Like both of you” Glimmer chimed in

“Thank you, both of you” Twilight said as she looked down at her filly

“You both made this night one to remember”