About an hour later of shopping for clothes, Shining Sensor and Starlight were standing in the Crystal Castle. A guard had been sent to get Shining Armor and Princess Cadence. Fortunately, the guard knew that Sunburst was going to be using the fusion spell multiple times in the following days, possible weeks.

"So, what exactly are the plans for these fusions?" Starlight asked. Shining Sensor shrugged.

"Honestly, it was mostly just to see if they were possible above anything else," he said. "Sunburst had good reason to suspect that the fusion spell might not work on members of different species."

"That makes sense, I guess," Starlight said. "But what about my fusion?"

"I'm probably going to see what physical attributes that fusion brings," Shining Sensor said. "Mostly what set of....genitalia that fusion gets." Shining Sensor was blushing as he finished that sentence. Of course that also made Starlight blush as well. That was also when Shining Armor and Princess Cadence happened to walk in.

"Sunburst?" Shining Armor gasped. Shining Sensor and Starlight looked at them, slightly nervously. "Dude....you look awesome!" Shining Armor was grinning and Princess Cadence was just smiling..but at Starlight.

"Thanks!" Shining Sensor said with a small bow. "But while in this fused state, I'm going under the name of Shining Sensor." Shining Armor grinned.

"Really? That's cool," he said. "Now, do you mind telling us a bit about this fusion?" Shining Sensor nodded.

"Yeah. Physically, I've got Thorax's wings and horns, and Sunburst's magic horn," he said. "I've also got abs and my legs are more athletic than either Thirax or Sunburst, and my colors are a combination of both. Plus my skin is a strange thing. It is both hard, yet fuzzy."

"That's cool, but what about abilities?" Princess Cadence asked with a grin. "Like, are you still able to cast magic, and can you sense love?"

"Kinda," Shining Sensor said. "I can sense it, but I can't tell where it's coming from, and who it's going to." Cadence's grin widened.

"That's cool," she said. "So you can tell that Flurry Heart is in the castle, but not specifically where?"

"Yeah, somewhere on the fourth floor," Shining Sensor said. "No, sorry, now she's on the third floor." Shining Armor's smile vanished.

"No! Seriously?" he cried.

"No," Shining Sensor said. "Now she's back on the fourth floor."

"You should probably go check on her, honey," Cadence said. As Shining Armor ran upstairs, she turned back to Shining Sensor. "Now, I know this going to be a little awkward and sudden, but how long is your penis?" Shining Sensor blushed, along with Starlight.

"Do I have to answer that," he asked. "I haven't actually measured it yet."

"But if you had to guess?" Cadence asked, giggling at the obvious embarrassment Shining Sensor was feeling.

"Again, do I have to answer that?" Shining Sensor asked. "Because I'd really rather not do that, especially with Starlight here." Cadence snickered.

"Don't worry!" she said. "I was just kidding! Mostly. You don't have to answere that question if you don't want to, although I doubt that I'm the only who's wondered that." Starlight started blushing harder.

"Nothing," she said.

"Anyway, what are your plans for the rest of today?" Cadence asked. "You are coming over for dinner tonight, right?" Shining Sensor looked confused.

"Why dinner?" he asked.

"Technically, you're still a foreign ambassador, and a friend," Cadence said. "Did Thorax forget about that?"

"I'm sorry," Shining Sensor said. "That's an intresting apparent side effect. I've forgotten about some things from both Thorax's and Sunburst's lives."

"Really?" Cadence asked. "What did you forget?" Starlight snickered as Shining Sensor looked genuinely confused.

"I...just said that I forgot them," he said. "I don't know what I forgot." Cadence laughed.

"I was joking about that," she said. "But that is intresting. So come over for dinner, and we can talk more. Oh, Starlight, you should come too!" Starlight's eyes widened.

"Me?" she gasped. "Why me?"

"Because Starlight has talked quite a bit about you," Cadence said. "Besides, you're friends of both Starlight's and Thorax's, so why not?"

"Well, ok!" Starlight said, amazed by this. "Wait, Sunburst talked about me?" Cadence was about to say something when Shining Sensor started talking.

"Ok, well, if that's tonight, we should probably get some appropriate clothing for it," he said.

About an hour later, the clothes shopping was done. It was hard to find some formal wear that would actually look good on Shining Sensor. But finally, they did find one. A nice brown suit, and a black dress for Starlight.

"Don't worry, you look fine," Shining Sensor said as Starlight tugged on her dress again.

"Yeah, but this is dinner with royals!" Starlight said.

"And I am royal!" Shining Sensor said. "Remember, I'm now half Thorax, not all Sunburst. Besides, don't you live with Twilight? Another royal?"

"That's a good point," Starlight said. A guard appeared to guid them to the kitchen. A few minutes later, they were there. There was already a bunch of food laid out on the table, and Cadence and Shining Armor where already sitting.

"Hello!" Shining Sensor said as he pulled a chair out for Starlight. "So, what where you wanting to talk to Thorax about?"

"Well, there were a few things," Cadence said. "But mostly it was about a partnership between changlings and ponies. And maybe learning a bit more about Changling biology." Shining Sensor nodded.

"Ok," he said. "I could probably get a couple of volunteers for you to, uh, study. And how does this partnership work?"

The next half hour was mostly just politics, which bored Starlight. She kept looking at Shining Sensor.

I hope he doesn't remember my crush on him, she thought. She wasn't paying attention when Cadence said her name. Finally, Shining Sensor tapped her shoulder. He was blushing quite hard.

"Where you listening to that last part?" he asked.

"I'm sorry, " Starlight said. "Not really."

"Well, um, Cadence wants us to, um," Shining Sensor started.

"I want you two to have sex," Cadence said. Starlight turned scarlet.

"What?" she asked. She had never gotten an order or request like that before!

"Well, we were talking about how Shining Sensor was in between Changling and pony biology, and what exactly that would mean, specifically for sex," Shining Armor said. "You don't have to have sex with him, but that would be nice." Starlight's mouth was wide open, her eyes flirting from Cadence to Shining Armor to Shining Sensor's scarlet face.

"This...is...very sudden," Starlight said. "Um...if I do accept it, this doesn't have to be here, does it?"

"Only if you want it to," Shining Armor said. She glanced at Shining Sensor.

"And you're ok with this?" she asked.

"Only if you are," Shining Sensor said. "You don't have to, because I can still, um, masterbait."

"Yeah, not yet," Starlight said. "After you defuse into Thorax and Sunburst. Sorry, I'd just prefer it being between me and Sunburst."

Well, either way, do measure your penis," Cadence said. "Just examine it, period." Shining Sensor blushed lightly as he nodded.

"Ok, I'll get to doing that once we get home," he said.

"Actually, we have some really great science equipment here," Shining Armor said. "If you want to stay here and do the....stuff, please, do."

"Sure, I guess, thanks," Shining Sensor said. "But all that I need to do is measure it, then masterbait."

Author's Note

This feels a little rushed to me, and I'm probably going to edit this in the future.