"I can't believe my sister had to miss out that part! It's so amazing!" Spike and Rarity's unicorn son commented.
"It's too gross for me!" the young female dragon shouted for her brother and caregiver to hear.
"But that's not all..." Yona stated, "After the wedding and honeymoon, Spike and Rarity decided, to have you two, their children!"
In a flashback, Spike was strolling through Canterlot and noticed a married unicorn mare and pegasus stallion with their four kids; one being a unicorn filly, one being a unicorn colt, one being a pegasus filly, and one being a pegasus colt. Seeng how happy the different species family was, gave Spike the idea of trying to have biological children with Rarity.
"WHAT?!" Rarity asked in shock, as a response to hearing Spike's idea. "But, dragons lay eggs, ponies give birth! How can we have biological kids?!"
"We can always ask some creature for help...and this time, since it's more science related, maybe a scientist would do the trick." Spike suggested.
The couple visited Doctor Whooves in his lab, where he kept all of his inventions. Fortunately, he had an invention that could help the couple; In Vitro Fertilisation. After carrying out an operation of retrieving Spike's sperm and manually combining it with Rarity's egg cell off-screen, Doctor Whooves dismissed the couple from his lab.
As they walked through Ponyville, Spike noticed Rarity not looking well. "Rarity, are you okay?" he asked in a concerned tone.
"Not really Spike," Rarity honestly answered, "Knowing that I'm pregnant is already an awful feeling; I heard a lot of stories of how painful having a baby is, or most likely, giving birth to one!"
"So sorry I had to put you through this, Rarity." Spike apologised, "Especially when in the end, you'll suffer by taking care of our kid, while I just do my job as for normal. Plus, we're still going to be apart for most of the time as long as I'm Twilight's Royal Advisor!"
"I understand, Spikey-Wikey! But don't worry...as the Element of Generosity, I should be able to suffer to give other meaningful gifts! Plus, Equestria needs kids to build up the future generation, and we're going to give it one!" Rarity declared.
"And it is very lucky to have a creature like you, just like I am." Spike told his wife, in a romantic tone.
Rarity giggled, "Oh, Spike! That is the best thing I've ever heard you say about me!"
"It's the least I can do...I mean, you're making a big sacrifice for the both of us, especially for...me." Spike replied, ""Not only don't I live with you, I won't take care of the kids with you, all I can do for you is give you all the bits or fabric or buyable things you need!"
"That is still enough and acceptable, Spike." Rarity assured, placing her hoof on Spike's shoulder.
A few months later, Rarity was forced to take a break from her work, letting her younger sister Sweetie Belle succeed her as the School of Friendship's Generosity Teacher. Spike often visited his beloved wife during his free time, checking on her and assuring her everything would be alright. As Rarity's situation got serious, Spike sent her to the Ponyville Hospital, where the doctors found out that Rarity had two babies, not one. What was most astonishing of all was; one of the babies was a male unicorn, and the other was a female dragon in an egg.
"I'm going to lay an egg?!" Rarity asked in shock.
"Because one of your kids is a dragon, and dragons hatch out of eggs." the doctor explained.
"Will she be fine?" Spike asked in a worried tone.
"She will, after giving birth and laying that egg." the doctor replied.
"But what about before that happens?" Spike asked.
"Well, she most likely will experience pain and uncomfortableness from time to time, but other than that, she'll be alright." the doctor explained.
"If only I can live with you, Rarity." Spike sighed, "Now I'm really sorry about putting you through all this pain."
"Oh, Spikey-Wikey, I know that you don't want me to suffer, but look at how happy we both will be once we have our kids!" Rarity pointed out.
"How come you're so positive about this? You're the one suffering, not me, and the whole thing was my idea!" Spike asked.
"Oh Spike, being generous is not just as easy as giving things away, it's also about being able to suffer to give others their needs and wants." Rarity explained.
"Thank you, for willing to do this." Spike told his wife, hugging her.
Weeks flew by and soon, Spike received a letter from the Ponyville Hospital; Rarity's babies were about to be out. Princess Twilight Sparkle was excited to hear the news, happily teleporting herself and Spike to the location. The rest of Rarity's best friends were already there, worriedly looking at the door of a room that had Rarity inside it.
"Is Rarity in there?" Twilight Sparkle asked.
"A hundred percent is," Rainbow Dash confirmed.
"And...not doing so well." Fluttershy added.
"She's been unwell since yesterday!" Pinkie Pie added.
"The doctors keep saying that everything's okay, but from the screams and groans of pain we've been hearing, we know it's not really alright." Applejack ended.
"Rarity isn't alright?" Spike asked, thinking about nothing except for his sweetheart, darling wife.
"Calm down, Spike, give the doctors the peace and quiet they need to focus," Twilight advised.
"But, Rarity's not okay!" Spike protested, a second before the door opened.
Rarity was smiling, as she levitated a newborn unicorn boy and a purple dragon egg with her magic for all of her friends to see. Every creature was charmed by how cute the unicorn boy was, while Spike was relieved that Rarity was alright, hugging her.
"Oh, Rarity, I'm so relieved that you're alright! I was actually going to bust into the room to check on you!" Spike exclaimed, causing every creature to get a bit shocked when they heard the Royal Advisor saying that he was going to do something that he should not do.
"Spike! Don't you know how wrong it is to do that?!" Rarity asked.
"I know, Rarity, it's just that, you being alright is what I had to ensure, you're the most precious treasure of all to me," Spike told her.
"Oh, Spikey-Wikey! That is really sweet of you, except for the part where you were going to bust in, which is wrong, that is." Rarity replied.
"Sorry every creature, for having the intentions to do something so wrong." Spike announced, before turning back to Rarity, "Now, what are we going to call our son?"
"How about, Precious Treasure? To remember what you said about me being the most precious treasure of all to you?" Rarity asked.
Spike's eyes instantly were filled with tears of joy. "Rarity, that's the best name ever! You're the best, sweetest wife ever!"
"And you're the best devoted husband, ever." Rarity commented, causing Spike to blush.
The next following weeks, Rarity was feeling a lot better, and Spike often visited to help her babysit Precious Treasure during his free time. One day, while babysitting his son, Spike heard cracking nearby. He turned to look at the egg, in the incubator, it was hatching!
"Rarity! The egg's hatching!" Spike called.
"Oh, really?" Rarity asked, galloping towards the incubator. The hatchling broke free from its egg and imprinted on its parents, who looked at it lovingly.
Rarity used her magic to levitate the newborn dragon in front of her, before telling Spike, "Spike, since I named Precious Treasure, why don't you name our dragon girl?"
"Well, I would like a great name for our daughter, just like how great our son's name is..." Spike said, thinking for while, before asking, "How about Sparity?"
"What?" Rarity asked.
"Sparity, our names combined." Spike explained.
Rarity blushed, "Oh, Spike! That's the sweetest name ever! I'm more than delighted to have Sparity as the name of our daughter!"
"And I'm more than delighted to have you as my wife, Rarity." Spike replied, before sharing a romantic kiss on the lips with Rarity.