Later on back at the castle, Spike was in an indoor pool room sitting at a table in his purple trunks conjured up by Celestia. Spike looked around seeing the pool was about as big as the ones you'd find at a hotel, complete with lounge chairs, tables with umbrellas, towels hanging up, and a bin to dispose of wet ones, and a sliding patio door leading to a deck.

Spike kicked back and relaxed, and thought, 'Indoor pool at the castle. This place is even greater than I said it was. And it's gonna be better because I'm going to be sharing this whole room with the sisters!'

"Spike." came Celestia's voice.

Spike looked over seeing Celestia and Luna standing before them wearing two piece bikini's that showed off their voluptuous figures that made any other girl Spike ever met look inferior. Celestia's bikini was colored yellow gold with a big sun symbol on both cup parts and a smaller one on the front of her bikini bottom. Luna's was colored black with constellation images on the cup parts, and her bikini bottom had a small crescent moon symbol on it.

Spike looked at the sisters with his eyes as wide as saucers, and his hormones went into overload. He could feel himself growing stiff before, before thinking, 'Joystick! Game on!'

"We're all set." Celestia said, while standing in a flirtatious pose.

"What do you think of our swimsuits, Spike?" Luna asked, while showing off her stuff like her sister was.

Spike knowing to be honest with the princesses, answered truthfully, "They look absolutely magnificent. I definitely approve!" he gave a thumbs up before realizing how he sounded, "Uh, as far as swimsuits go at least."

The two sisters giggled, "It's quite all right, Spike," Celestia began, "We're actually pleased with your answer."

"Really?" he asked hopefully.

"Agreed." Luna nodded, while hiding a blush.

"Well, thanks." Spike said feeling so much better.

Luna smirked, and poked at the side of her sister's stomach, "Though you'll have to forgive Tia. She has been putting on a few pounds from her constant cake snacking before bedtime."

Celestia looked at her sister feeling insulted, "Excuse me? I have not done that in a long time!"

"I don't know. I have seen some frosting on your lips before you turn in." Luna teased.

"It was just a piece not a whole layer of it!" the elder sister argued, until they looked to Spike who stood looking confused.

"Am I missing something here?" Spike asked.

Celestia shook her head, "It's nothing. Now then, let's swim to our hearts content." she declared, as Luna and Spike smiled.

And so the three were swimming around the pool having fun with doing laps and splashing each other. As Celestia and Luna splashed each other playfully, their busts bounced all around sending Spike into a deeper state of arousal. In the heat of things, he saw a familiar golden yellow bikini top floating in the pool. His eyes widened and face turned red before looking over at Celestia who wrapped her arms around her enormous chest while sinking herself down into the water till it reached her neck. Luna was holding her hands to her mouth laughing hysterically. Spike using his own magic levitated the top over to Celestia who reached up and grabbed it before turning around and put it back on.

Soon the three were relaxing in lounge chairs while enjoying a drink. Spike kicked back and spoke, "Man, this was sure as hell a fun time. Thanks again for inviting me, your excellencies."

"Any time, Spike." Celestia replied.

"It's rare we get some time to ourselves like this, especially with others." Luna admitted.

"I can believe the part to yourselves, though not with others?" Spike wondered.

"While we are very popular to our subjects we hardly have time to actually summon anyone for a day like today." Celestia explained.

Spike was curious about the two, until he asked something, "How many ponies did you know over the years?" the sisters turned to him, "I mean if you two have been around for a thousand years you had to have met a lot, right?"

Celestia nodded, "You're quite right. Luna and I have been around longer than you know. Even during the founding of Equestria, but we were just foals at that time."

"That's right," Luna confirmed, "While Equestria was ruled by the three founders, Celestia and I were just normal unicorns until we discovered we had immeasurable powerful magic within us. We sought out the greatest unicorn of the day Starswirl the Bearded."

"Starswirl? As in Starswirl academy?" Spike wondered.

Celestia nodded, "Yes. Starswirl taught us everything we knew about magic, even magic beyond his comprehension. Over time the two of us discovered we had the power to raise and lower the sun and the moon. We took it upon ourselves to maintain order between day and night earning us our wings and the titles of Princess."

"Starswirl stuck around for awhile until he deemed us ready to take on everything without him. So he left Canterlot to explore Equestria," Luna explained, "One of the places he visited was your world where he started a normal school for young ones. That is how Starswirl academy was founded."

"Wow." Spike gasped in shock.

"Over the years Starswirl knew he couldn't live forever so he eventually retired as Headmaster from the academy and left it to members of the faculty then and since." Celestia answered.

"So how did you become Principal of the academy in this century?" Spike asked the Sun Princess.

"During that time after I banished Luna to the moon I had to take it upon myself to maintain day and night by myself. But I was alone and needed something else to get me through my grief. When I heard the former principal had planned to retire I took it upon myself to work for the position and I became the new Principal of Starswirl Academy."

"You had to have a pretty busy schedule being both Princess and Principal." Spike said.

"It's true, but the more work I did, the more I was able to forget about the pain and concentrate. And you know the rest when I met Twilight and took her under my wing."

Luna continued, "And yes during our reign together we've made tons of friends and allies over the years. Sadly they were not gifted with the longevity we have received upon ascending to the rank of Princess."

"We've seen many come and go, while we lived on," Celestia said sadly, "We've known ponies since their prime and but watching them grow old, withered, and absent minded while we continue to remain young and vigorous."

"And I thought being able to live forever was a good thing." Spike said in disbelief.

"Immortality is a curse in disguise, Spike," Luna answered, "Eternal life may keep you out of reach of death, but you will lose everyone close to you one day to the hands of time."

"That is why we never even bothered to try searching for the simplest thing. Love for another in that sense."

"You mean as soon as you became Princesses you never even bothered to go dating any pony?" Spike asked in shock.

"Royalty does not simply date, Spike. Things like that is usually prepared ahead of time or made a big deal of," Celestia replied, "Plus there weren't that many suitors who wanted us for who we were."

"They mostly wanted special privileges that only we could grant." Luna added.

"Jerks," Spike grumbled, "Though what about others like Cadence and Twilight will they have eternal life since they're Princesses?"

"Not so much," Celestia answered, "Luna and I are bound to the sun and moon. Only we have the power to move them and thus are needed to stay alive. Cadence and Twilight however will live ordinary lifespans like any other pony."

"And me?" Spike asked in a worried tone, "I've learned from Ember dragons also have incredibly long lifespans. Does that apply to me since I'm part dragon now?"

"We're not quite sure about you since we've never seen a human with the power of a dragon." Celestia replied.

"This is just something you'll have to find out for yourself." Luna added.

"I see," Spike sighed before thinking, 'Oh, man. I had no idea the Princesses had it rougher than I thought. I mean dealing with ponies of high class and important matters day in and out without even a break or a chance to have love lives. If it were me I would've cracked a long time ago under pressure.'

'Glad you chose not to actually aim to be Dragon Lord in the Gauntlet?' Bahamut thought.

'Damn right. But still Celestia and Luna are more than just Princesses or even heads of the school. They're just like me and the girls, and no amount of hierarchy can change that.'

'So what do you plan to do?' Bahamut asked knowing the answer already.

Spike thought back, 'Give them what they need,' he spoke up, "Listen Princesses, there's something I want to ask you two."

"Oh, and what is that, Spike?" Celestia asked, as she and her sister looked to the dragon with curiosity.

Spike took a deep breath and spoke, "I want the both of you to become part of my harem!"

As the words left Spike's mouth, silence hung in the air. It was so quiet you could hear the sounds of crickets. The two sisters personally looked at Spike in a state of flabbergast. The dragon boy decided to break the awkward silence, "Too much to ask?"

"No," Celestia answered before correcting herself, "I mean yes... I mean... That's a very bold thing to ask, especially to us of all ponies."

"Correct. We thought you would be too intimidated to ask us because we're not only princesses of this land, but your principal and vice as well." Luna added.

"Believe me I already knew that, and I was intimidated," Spike admitted, "But after listening to all you said it had me thinking about life and it can be too short or too long depending on who's involved. And since you two have never had a real love life, why not start one with me?"

"You would actually want us in your harem?" Celestia asked.

"Of course. I mean I know the idea would be a tabloid reporter's dream to print, but you two aren't just positions and titles. You're ponies like any pony else in Equestria, or any person in my world. You deserve love just as much as me or any of the other girls. If there's consequences from other royals words or even Twilight I'll face them, but nothing will stop me from showing any one is capable of finding love. So I'll ask again. Will you two accept my offer?"

The two sisters looked at each other for a moment before smiling and turned back to face Spike. Celestia answered first, "I would be honored to be part of your harem, Spike."

"As would I." Luna agreed.

Spike smiled, "I'm glad to hear your answers. Plus this way you'll feel even closer to me and the rest of the girls than you already are."

"We would like that very much." Luna nodded while smiling.

The two got up from their seats and went over to Spike, "Let's start sealing the deal with this." Celestia began as she cupped Spike's chin and placed her lips onto his. Spike's eyes widened as the sweet feeling of the Sun Princess' lips pressed into his own.

When they parted, Luna took her sister's place, and gave him a kiss too. Much like his kiss with Celestia, Spike was savoring the soft and hot feeling of his kiss with Luna as long as he could. Eventually the two came up for air, "Mm. I've never felt anything so sweet in all my life." Luna said seductively.

"I'll admit for not having love lives the two of you sure know how to kiss." Spike said between pants.

"Just because we haven't dated in years doesn't mean we don't know how to handle boys." Celestia replied.

"Trust me what we have in store for you now, you won't be doubting what we're capable of when it comes to the opposite sex." Luna smirked with her sister.

'What they have in store?' Spike thought to himself, knowing he was really going to be in for it soon.

Later on as Celestia used her magic to make the sun set and Luna made the moon rise, Spike was walking to Celestia's chamber room where he was told to meet the sisters. He looked up at the doors and said to himself, "Whatever I see on the other side of these doors I must be prepared and absolutely calm." he braced himself and opened the doors.

He looked inside seeing Celestia's chamber was huge like Spike's bedroom with a large bed, a fireplace, a sofa and coffee table, and a balcony window. He stepped inside and called out, "Hello? Celestia? Luna?"

"Welcome, Spike." Came Celestia's voice.

Spike looked over and saw walking out from the shadows of the room was Celestia and Luna wearing very loose fitting robes. Spike could see their breasts peaking out from the robe which enticed him into submission, "How do we look?" Luna flirted with him.

"Absolutely awesome." Spike answered, while unable to take his eyes of them.

"Then you'll love this even more." Celestia said, as she and Luna undid the sashes of their robes and slipped them off their shoulders making them fall to the floor.

Spike's jaw fell open and almost hit the floor as he gazed at the sight of the celestial princesses in all their bare naked glory. His heart started racing so fast it felt like it was going to leap out of his chest. The two sisters started blushing while standing sheepishly, "If you keep staring like that, I'm going to blush." Luna said playfully.

'Jackpot, baby!' Spike thought in excitement. Not wanting to keep the two waiting, he spoke up, "You two look so hot."

"Thank you," Celestia smiled, "Now then, let's get you all prepared." she and Luna used their combined magics to poof Spike out of his clothes that were suddenly and neat and folded up on the sofa.

As Spike stood in his birthday suit before the two sisters, he didn't know whether he should've covered his lower half or not. But he had no time to think as he found himself being levitated over and landing on the bed. The two sisters got on the bed and crawled up to him while eyeballing his bare body, "Mm, honey, you look good." Luna licked her salivating lips.

"All those workouts and training has done your body good." Celestia added.

"Thanks," Spike smiled, as he stayed strong and not feel intimidated as the two got closer, "Ms. Celestia and Ms. Luna, what would the parents and faculty say if they knew you were putting the moves on one of your own students?" he teased them.

Celestia played along, "What they don't know won't hurt them." she smirked.

"Agreed," Luna added, "This'll be between the three of us. And nobody has to know."

"Well, in that case let's get wild." Spike said.

Celestia and Luna smirked, as they each took Spike's hands and placed it on one of their breasts each. Spike panted from the massive mounds in both his palms and started to squeeze them earning lustful moans from the sisters, "Oh, I'm starting to feel hot all over." Luna moaned.

"Me too. Twilight and the others have been so lucky to have this." Celestia moaned.

Spike thought to himself with excitement, 'After tonight I'm gonna have so much power reserves I could fight for months, maybe even years!' The sisters piled onto Spike, as the three went all out.

Meanwhile in the Crystal Empire, Cadence and Shining Armor were looking out at their kingdom admiring the view, until Cadence shook while gasping, "Everything ok, Cadence?" Shining asked in concern.

"Oh, I'm fine, Shining Armor. I just have this gut feeling my aunties are having the time of their lives, and in the big way."

"Really?" Shining asked with his arms crossed.

"Yes. I may have to ask them about it some time."

While back in the human world, Twilight who was helping Pinkie and the others prepare for Spike's welcome back party, felt a similar sensation in her bones, "Ooh!" she gasped.

"You ok?" Rainbow asked.

"I'm fine. I just have this strange feeling." The Princess of Friendship answered.

"About Spike?" Sunset inquired.

"Something like that. Almost as if he's... No, it can't be." she denied her thoughts.

"What is it, darling?" Rarity wondered.

"It's nothing. Probably just my imagination." Twilight said, as she continued to help decorating while the girls were concerned.

Hours later as the moon shined across the land in Equestria, Spike stood before Celestia and Luna with all three fully dressed, "Thank you for the glorious day, Spike." Celestia thanked him.

"Thank you both for inviting me." Spike replied.

"It was our pleasure." Luna answered.

"So do you have the letter?" Spike asked the Princess of the Sun.

Celestia levitated a scroll to him with her seal on it, "Right here. Show it to Twilight, and pray she doesn't turn you into a dragon skin rug."

Spike cringed, "Yeah. That's the hard part. Well, I better face it now. We really should get together again soon."

"Agreed. We'll check our schedules," Luna said. Spike opened a portal and entered it before closing. Luna turned to her sister, "I sure hope Twilight and the others won't rough him up too much."

"I think he'll be fine." Celestia smiled confidently.

The scene cut to the outside of the Drake Mansion, as Twilight's scream could be heard, "WHAT?!" Inside the mansion, everyone's eyes were wide in shock from not only Twilight's outburst, but from what she had read fro the scroll Spike brought to her.

"You asked the royal sisters and they agreed to be part of your harem?" Vinyl asked, as she fixed her sunglasses.

"Yes, and as you saw in the letter Princess Celestia wrote it was for good reasons." Spike defended himself, while trying not to feel threatened by Twilight's glare.

"And did you three consummate?" she asked through her teeth.

"Yes." he winced.

"Ugh!" Twilight gagged, "I did not need to hear that!"

"Then you shouldn't have asked." Pinkie said bluntly, only to receive an agitated look from Twilight.

"Twilight, I know this is a real big choice asking the Princesses of all ladies, but look at it from their side," Spike reasoned with her, "They've never had the chance to love the way we do. They've been so preoccupied with their leadership in Equestria and jobs here. Even if they outlive any of us the least I can do is give them a chance to experience real love just as I've done with you girls."

'He does have a point, Twilight." Applejack admitted.

"Indeed," Rarity agreed, "Perhaps, time with Spike is exactly what they need to relieve stress from the work they do. After all it's worked with us, right?" she nudged Twilight, who couldn't help but smile at her logic.

"Ok, you got me there," she turned to Spike, "All right, Spike. I accept you bringing Princess Celestia and Princess Luna into your harem."

"Thanks, Twilight." Spike thanked her.

Twilight suddenly looked at him firmly, "But if you dare think about adding Cadence to your harem, I will never let you touch me ever again."

Spike paled at the thought of that ans answered quickly, "No, Twilight! I would never think of it. I swear on my mother's eyes!"

Twilight smirked, "Good. Now that that's settled, let's party!"

"Yeah!" the girls cheered, as the Welcome Back Spike party began with everyone having fun.

After the party, everyone was in bed with Spike and Twilight sleeping together with Twilight draping herself over her soul mate, "Spike?" she asked.

"Yeah?" he asked.

"When you asked the Princesses to join your harem did you think about me and how I would feel about this?"

"Of course I did. I'm always thinking about you, Twilight. But just because I have your mentor and her sister in my harem doesn't make you any less special to me. You're the real Princess in my life. And none of them can take that away from you." he gave her a comforting smile.

Twilight blushed and returned a smile, "You always say the sweetest things, Spike."

"That's how I am. And always will be."

"Mm. I know. Goodnight, Spike." she nuzzled with him.

"Goodnight, Twilight." Spike kissed her forehead, and they fell asleep together.

Author's Notes:

And so Celestia and Luna have joined the Dragon King's harem. I know many of you were waiting and so I did it.

These are what Celestia and Luna would look like in the swimsuits I put them in.

Celestia: http://pre13.deviantart.net/858c/th/pre/f/2014/153/b/5/bright_summer_days_by_blumagpie-d7kq3w4.jpg

Luna: http://pre09.deviantart.net/864e/th/pre/f/2014/147/4/1/summer_night_swim_by_blumagpie-d7k1lta.jpg