It had only been a few days sense Eris and Spike’s twins were born, causing Eris to move into the Friendship Castle so that they could with both Spike and their herd mothers. Spike couldn't happier. Sure it was a shock to learn that he had just knocked up his flesh and blood sister. But Twilight was already his sister in everything but blood so being responsible for sexually pleasing Eris was comparatively far less of a mental hurtle for him.

Sure it was a lot of hard work being a new father to his handsome little dragon son Typhon, and his beautiful hermaphroditic draconequus daughter Echidna. Especially when they found out Echidna had Eris powers, but he was loving being every second of it. As did Eris and his wives despite the hard work two newborns brought.

Which was why it did bother him that he was called to do his duties as both House Alicorn royal concubine and as the sole stud of the royal dragon breeding program. But duties were duties, and beside something about having his darling little twins did make him believe more so than ever that Celestia and Luna were in the right to start this program to bring back the royal dragons. Even if he didn't know why. These were the things he thought as he walked to the private meeting room in the crystal palace.

"Spike! How have you been?" Cadence said, holding Flurry Heart as Spike enter the room.

"So how has the father life been treating you little bro?" Shining Armor said as greeted Spike and hugged his wife.

"Don't you mean the mother life?" Cadence said with a giggle.

"I’ve been doing great. So has every creature else. So how have you all been? Especially my favorite niece?" Spike said as he picked up Flurry Heart from Cadence, which based on her giggling was something she really enjoyed from her favorite and only uncle.

"Glad to know there is at least one alicorn in the world I don't have to worry about coming for my ass." Spike said as he smiled at his baby niece.

Far Into The Future

"Flurry Heart! How’s my little niece on her special day." Spike asked as he walk to the meeting room.

Only to be immediately knocked to the ground and have his whole body locked in place between the thicc muscular thighs of the largest alicorn to have ever known to exist!

"Hello Uncle Spike. You know what I want from my favorite uncle on my 'cumming' of age birthday? Here a hint it starts with you and ends in me." The large and nude Flurry Heart Princess Of The Storms said in a lustful tone and with a predatory smile as she ripped off Spike's clothes.

Back In The Present

Spike blinked as he looked into the large innocent eyes of his niece. "That’s odd. I just felt a chill run down my spine for some reason." Spike said while the Flurry playfully clapped her hooves and giggled.

"Its probably nothing, now before we get to your duties. I think we should give you your gifts." Cadence said with a smile as she took Flurry from Spike’s arms.

"Gifts? What gifts?" asked Spike.

"Think of them as late foal shower gifts. Now let me present to you your new castle guards." Cadence answer.

"Guards? Why do you think I would need guards at the friendship castle?" Spike asked clearly confuse

Shining looked a Spike with a stun face. "Spike. No one is doubting you or your herds ability to keep your foals safe. But your castle is about to be filled to the brim with exceptionally powerful foals. There are a lot of creatures out there that would love to get their claws on such powerful foals, and a lot of ponies who aren’t happy about the arrangement you have going on. I for one would rest easier knowing you at least a few guards to keep the castle and school safe." Shining Armor explained

Spike thought about it. Leaving it to Shining to be the one to think ahead in terms of military strategy. While he didn't like what Shining was hinting at about creatures wanting his children for their power, he also remembered some of the less than pleasant aspects of growing up in Canterlot where pony elitists who had no problem bullying a dragon whelp were everywhere. “I see your point. I’m sure the foals will be safe in Ponyville but I guess I it wouldn’t hurt to have a little bit of extra security."

Cadence smiled wide. "Great. In that case I'll bring out the elites. You are going to love these fillies. Their father was actually a royal dragon!" Cadence said beaming with pride.

"What really?! Normal ponies whose father was a royal dragon?! I can't wait to meet them, it will be great to find out how this whole dragon blood thing will affect non-alicorns." Spike said, glad to meet some non-alicorn ponies who had a royal dragon sire. He was still wondering how the whole thing would affect his daughters.

"Yeah about that, for the record it wasn't my idea to pick these three." Shining said with a nervous look.

"ELITES! COME AND GREET YOUR NEW MASTER!" Cadence shouted in her Canterlot voice, shaking the whole room.

With a giant boom of light the three largest and muscular non-alicorn mares Spike has ever seen appeared before him wearing nothing but helmets and chain-mail bikinis.

"Holy Tartarus!" Spike shouted in surprise in seeing them.

"WE ARE THE ELITE CRYSTAL GUARDS! STRONGEST OF ALL CRYSTAL PONIES AND DAUGHTERS OF THE ROYAL DRAGON SPINY!" They shouted in unison with one voices matching that of Cadence's Canterlot voice.

A bright red crystal pony steped forward and stomped the floor with her right front hoof. Causing a small tremor as she did. "I AM RUBY CRUSHER! STRONGEST OF ALL CRYSTAL EARTH PONIES!" she said and then stepped back.

Next a bright white pegasus stepped forward and filled the room with gale like winds with a few flaps of her mighty wings."I AM PEARL BREAKER, STRONGEST OF ALL CRYSTAL PEGASI!"

Finally a bright blue unicorn stepped forward as a blue flash emanated from her horn. "I AM DIAMOND SMASHER, STRONGEST OF CRYSTAL UNICORNS!"

"WE ARE YOU NEW GUARDS PRINCE SPIKE!" The three shouted unison once more while doing a pose so lewd that Spike covered Flurry Heart's eyes on reflex.

"W-why are you dressed like that? Shouldn't you be wearing armor?" Spike said still in a bit of shock at what he was seeing.

"Armor would only slow us down!" Ruby crusher answered.

"Beside what do we need armor for. Most weapons would break on our perfectly tone muscles." Diamond Smasher added.

"That is true, I have seen them do it." Shining Armor said.

"Besides it very hard to get stains out of armor that our oiled down crystal bodies would cause." Pearl breaker added

"But enough of this talk. I must say oh great and power Prince Spike the idea of serving under you sends quivers of orgasmic delight throughout my very being." Diamond Smasher said as she stepped so close to Spike that her oiled up breasts were almost fully in his face.

"I for one would love to do some weapon training with you oh Prince Spike. How about I teach you to thrust your lance deep and strong? I can even get a harness to give you a more hooves on experience." Ruby Crusher said as she place her oiled up breasts on the left of Spike's head.

"Why not some hoof to hoof training instead? We can strip you down and oil you up with our special lube to teach some great grappling holds." Pearl Breaker said as she place her own oil up breasts on the right of Spike's head.

"I-Oh." Was all Spike could said as he found his sight filled with nothing but almost nude oiled up crystal breasts.

Flurry Heart laughed at the sight of her uncle being smothered.

"Fillies that’s enough. Spike, Shinning and I need to have private royal talk. So please leave us." Cadence order

"As you order princess of lovemaking!" Diamond Smasher shouted as the trio did yet another lewd pose before teleporting away with a bang.

"What was that about?! And why have I never seen those three before? Cause I think I’d notice mare guards like that any time I have been over here." Spike asked.

"They have only recently became guards, they are only about a month older than you. Also I should warn you that they have younger sisters all wanting to be guards as well." Shinning Armor explained

"Sisters? They have younger sisters!" Spike said

"It turns out that Princess Amore had her royal dragon breed the largest and strongest crystal mares in the the crystal empire in other to make future guards like those three. As to why she didn't seem to make a few whelps and foals herself with him nopony seems to know." Cadence explained.

"Are those the mares you picked me to breed?" Spike asked

"Not exactly, you see, well Cadence do you want to take this one?" Shining Armor said.

"Spike do you remember those crystal guards we had you impregnated on the day you found about your duties?" Cadence asked.

"Well of course, well as much as I can. I never got their names and they wore their guard colors the whole time." Spike answered.

"Those mares are now very special mares, for those mares are the only crystal mares that have gotten pregnant sense the crystal empire has return." Cadence said

"What? How is that even possible? The crystal empire has been back for years now, have all the crystal ponies not been rutting or did Sombra geld all the stallions?" Spike asked, very confused by what he was hearing.

"It’s more complex then that but to put it simply it is a mixture of the crystal ponies getting used to how Equestria changed sense their day and over using contraceptives." Cadence said

"I think you're going to need to explain a little bit more than that." Spike answer.

"To help the crystal ponies get use to modern Equestia we started teaching classes for them so they could learn what has changed sense they were gone. Like how stallions have equal rights now, how there is now an age of consent, and how you can't just buy your future husband from his mothers by paying in chickens. Naturally the crystal stallions were overjoyed in learning these things but the crystal mares not so much. This at first led to very awkward interactions between mares and stallions since neither were entirely sure how to act around each other under such drastically different laws." Cadence explained.

Shining armor then took over for his wife. "Of course if that was the only problem things would have sorted themselves out eventually. But it turns out that crystal stallions have a lower libido and fertility than most other stallions for some reason. At least when the mares aren't in heat. Plus the crystal ponies are having a tough time wrapping their heads around how to use contraceptive potions." Shinning Armor added.

"Which normally wouldn’t be a horrible problem but when Sombra sealed the city he only took the crystal ponies that were in the limits of crystal capital borders. Their were crystal ponies left behind who either died out or interbred with other ponies breeds. While the crystal ponies have never been too numerous this still was a good cut of their numbers. Which means we now have a have a small population where the stallions have low libidos, the mares aren't doing a great job of attracting them or getting them in the mood because the ways they would do it before are almost all illegal, and when sex does happen tend to overuse contraceptions." Cadence explain.

"Okay I can see the problem, but why is this the first I'm hearing about it? I would have through Celestia, Luna, and Twilight would have told me something while working on the issue." Spike asked

"They don't really know, do you have any idea how embarrassing it would be if I the alicorn of love had to ask for help with something like this? This is literally suppose to be my thing! This is where my plan comes in, or should I say where you cum in them." Cadence said.

"You want me to breed a few of mares. I get that but with that jackalop spell I don't see how that will make too much different." Spike said, while Flurry Heart begin to watch his tail move back and fore.

"Because we don't want you to breed just a few, I have a plan that will leave a whole bunch of broodmares with bellies full of dragons and crystal foals. If you agree to it that is." Cadence said.

"We also have a plan to help the stallions a bit of a boost as well that also needs your help with. With any luck this will give both the crystal ponies and royal dragons the boost in population they need." Shining Armor said.

"If it will help then I have little choice but to agree. After all I'm still the hero of the empire last I checked." Spike said with a smile as she dusted his knuckles against his chest. The crystal empire was the one place Spike allowed himself to parade his hero status and have a bit of an ego. Probably due to the fact he’s been celebrated as one here since he was a child.

"Oh Spike I'm so glad to hear that! Now with that out of the way all we have to do is put Flurry down for her nap time. Then it will be play time for the three of us." Cadence said with a lust full smile as she swished her tail across Spike’s leg.

Meanwhile Big Mac is proposing to Marble Pie, Cheerlie, Sugar Belle, Sweetcream Scoops, and Tealove. And based on how they were dog piling him I think it is yes. Now off to the dragon lands!

Queen Ember the scrawny blue ruler of dragon kind was reading a letter from a certain purple princess pony.

"Due to lack of knowledge ,blah blah blah, ask for your aid in updating the draconomicon, blah blah blah, request permission to come to the dragon lands to do so. And yes we would be bringing Spike with us on this, maybe you could make this move you were talking about during this." Ember said to herself as she read the letter.

"So two of Spike's whelps are already here and he and his hoard wants to learn more about dragons and teach it to others in Equestria. This is perfect chance to make my move! I just have to tell those breeder dragonesses and the draka- damn it! I still haven't found a drakaina yet! By Tiamat what am I going to do?!” Ember shouted in frustration.

Then in a flash the answer hit her.

"By Tiamat, that’s it! What better drakaina could an equestrian prince and a dragon lord concubine ask for then her. Looks like it’s time to pay my dear sister a visit." Ember said with a devilish smile.