Polyamory

Cadance thought about telling Shining what he was getting into. Or rather, what was getting into him. But surprises were so much fun; who didn't like surprises?

“Do you have something planned?" Shining called her on it as they were leaving dinner at Canterlot Palace.

Cadance was very good at hiding her deviousness, particularly when in public. Shining had been with her a while now though, and could usually see through it. Given that, there wasn't any point of denying it, so Cadance didn't answer at all.

Shining grinned. He knew that when Cadance ignored that question, fun was incoming. Cadance smiled back at him for a moment they simply looked into one another's eyes.

"Greetings my companions with benefits!" Luna's approach was so sudden that the two instinctively erected magical barriers. Luna looked hurt. "Does my presence now cause you discomfort?"

"Oh goodness no, Auntie," Cadance dropped the shield and took a deep breath, "It's just you can be... sudden at times."

Cadance shared a brief but deep kiss with Luna as if to prove her comfort. Shining followed up as Luna moved to kiss him as well.

"I'm happy to see the mother of my child, love," Shining smiled. The mother of one of his children at least. Who knows how many foals Shining had now; it depended on how many he’d put in Chrysalis.

Shining's wording caused Luna to blush sharply. She regained her composure enough to speak after a few seconds of fighting back said blush.

"After significant consideration, I have arrived at a final judgement!" announced Luna, "I shall be wed to your union forthwith."

"Is that an order?" chuckled Shining. "An order I like, at least."

"Maybe not forthwith,” Cadance smiled gently. "Let's take time and plan something special." After all, they might be adding some ponies to the ceremony if all went well. "While your subjects won't mind your sudden impregnation, they will very much mind if they don't get a proper celebration."

Luna sighed and let her stature slump into a less-commanding pose. "Apologies. I get really official when I'm nervous. I still haven't even told Celestia that I... did those things."

"That you had an orgy with every guard for a two-mile radius? Twice?" giggled Cadance. "Come now, you know she won't judge you for breaking the vow."

"Yes, I do," smiled Luna, "But all the same I did so suddenly and without informing her. I guess... I am afraid to disappoint my big sister."

"Well if you don't want to tell her yourself, she'll find out from somepony else," Shining pointed out. "Those guards have been loud and proud. I'm pretty sure a lot of subjects are talking about it now, and it won't be long until the newspapers report it. As much as they can report in a newspaper at least."

"How have ponies reacted?" Luna looked down at the floor in shame.

"No one cares that you broke the vow," Shining stepped forward and gave Luna a brief hug. "Like Cadance said, they're excited about the idea of another royal wedding."

"And nopony thinks you're a slut, Auntie," Cadance assured. "Ponies don't think like that anymore. The rumors haven't been that you're easy. The rumors are that you're a hot vixen that made a lot of guards very lucky."

"It is you who have made me lucky," smiled Luna, "For now, I have more to do. If I do not see you again tonight, I'll at least make sure you have good dreams. Very good dreams."

"Oh, are you the reason my dreams have been so amazing since our fun?" smirked Cadance.

"And the reason that my dreams have all involved Twilight showing up in kinky outfits?" Shining shifted a hoof and blushed.

"That's a possibility," smiled Luna.

Luna turned and trotted off, as she had more duties to attend to. Cadance and Shining watched the ample moon plot until Luna turned a corner and went out of view.

"I can't believe this turned out so well," Shining said in awe.

"I can," said Cadance, walking again toward their room, "Aren't you glad you took my advice? I am the expert on love after all."

"Oh I've learned to trust you," Shining smiled, "Though, is it even legal for Celestia or Twilight to join now? Siblings and all..."

"It's very illegal," said Cadance, "Except by royal decree, which means it's not a problem. Besides, I'm pushing to strike that law. We've developed magic to prevent defects, so there's no reason we should be interfering in family-fun."

"It would allow for less boring family reunions too," Shining jested.

Shining looked so happy, and Cadance loved that as much as she loved him. She wanted to see all his biggest fantasies come true. His life was so fleeting compared to her own, and she'd promised herself to make what life he had amazing.

Cadance was sure she could get Twilight involved. Twilight crushed on Shining as much as he did Twilight, after all. Even Chryssie, assuming they could get her to show up, would be pretty likely. Cadance only need spin things in such a way to make Queen Bug Horse feel like the 'winner'.

The one Cadance was least sure on was Celestia; she wouldn't make herself as vulnerable as Luna. Atop that, thinking about the reason for the royal vow depressed Cadance, which impeded her abilities. Celestia had tortured herself for so long. Cadance felt, given what her own talent was, it was her duty to help.

Cadance’s thoughts moved to more immediate things as they arrived at her and Shining’s room. They both headed inside and walked towards their bed together.

“I do have a surprise for you, Shiney,” Cadance commented as they approached the bed and she closed the door.

“Will it require a safe word?” Shining chuckled. “Never mind. You’ll gag me so I can’t use it anyway.”

“You know me so very well,” grinned Cadance, reaching out a hoof and touching his nose.

“Boop!” said Cadance, and Shining flopped onto the bed in a magically induced sleep.