"Oh my, you're definitely a soggy little filly tonight, aren't you?" Sunburst asked Starlight, who was laying in front of him on the changing table in her room, as he pulled the soaked diaper out from under her. He pulled several wet wipes from the box, and began to gently clean her marehood and around the base of her tail. She only did a little squirming as he finished up and grabbed a fresh foal-styled diaper from the stacks in the shelves that were built into the side of the table. He unfolded it, and slid it under her, quickly and expertly fastening the first set of tapes around her tail, before setting her down on it. He magically grabbed the bottle of foal powder and twisted the cap open, and turned it over and sprinkled it over her diaper area, adding a little extra to the diaper itself before setting the bottle down and brought the front up between her legs and smoothed it against her stomach, bringing the back wings up and began to tape it up.

"There we go, nice and clean." Sunburst said, fastening the last tape on Starlight's fresh diaper, before rolling up the wet diaper and tossing it in the pail next to the changing table. His task complete, he levitated the adult unicorn over to the crib, while also grabbing hold of the footie pajamas that were currently resting on the bed, and quickly got them on her before laying her down, and grabbing the bottle of warm milk from the nightstand, and let her suckle from the nipple as he began to get the bed covers organized. The milk quickly made her eyes grow heavy as it made its way to her stomach. As she made her way through the second half of the bottle, he went over to the nightstand next to her bed-turned crib, and began winding up a music box, that would start playing a lullaby shortly.

"Alright, nighty-night, little Starlight." Sunburst told her, his glowing horn simultaneously tucking the fully-grown unicorn into bed and removing the bottle from her lips. He gave the bed comforter one final test tug to make sure it was snug, before turning and walking towards the exit, joining Trixie at the door, where they shut off the light and stepped out into the hallway, closing the door behind them.

"Well, that was certainly a fun day." Sunburst began to Trixie as they made their way downstairs to the kitchen, Trixie magically holding the empty bowl and spoon that Starlight had been fed with right before bed.

"Indeed. Although, to be honest, I've spent the last part of today thinking about tomorrow." The stage magician replied as they entered the kitchen, taking the bowl, spoon, and bottle to the sink and began running hot water.

"Hearts and Hooves Day? You think that's a good day for more playtime?" Sunburst asked, rinsing out the bottle while Trixie wiped out the bowl and cleaned the spoon.

"Playtime... In a manner of speaking. Have you noticed how Starlight hasn't physically regressed herself with a spell for a few weeks now?" Trixie asked.

"I have noticed, actually." Sunburst replied. It had been over a month since Starlight had used a magic scroll that transformed her into a foal; instead she had opted to stay in her adult form. At first, he thought she had run out of parchment, but that wouldn't have taken weeks to stock back up on.

"Then I'm sure you've noticed how... Aroused she gets when we change her?" Trixie asked, her cheeks tinting considerably, with Sunburst's following in kind.

"Y... Yes." He answered simply. It was the plain truth, which was why he had wondered why it would be taking her so long to get more regression spells ready. It would save her from such embarrassing incidents during changes. Unless...

Unless it was what she wanted. Unless she was clearly enjoying it in that way.

"Sunburst, let me ask you a question, friend to friend. Are you attracted to Starlight?" Trixie asked, her two dishes done and put on the drying rack, and now turned her complete attention to the crystaller.

Sunburst's blushing cheeks only deepened.

"I-Is it that obvious?" He replied nervously, adjusting his glasses.

"No, not that obvious. But I have suspected for a little while. The.. The thing is, I am too." Trixie said, her embarrassment now matching Sunburst's as she began to fidget with her front hooves. "I didn't bring it up, or make a move, because I had my suspicions of how you felt about her, and I didn't want that to come between us as friends. But lately I've been considering... What if we didn't let our feelings for her come between us? What if our feelings were something we could share?" Trixie asked, nearly shivering as her gaze met Sunburst's.

"Does she even, you know, go that way?"

"She's bisexual. She and I had a little wine after one of our performances a few weeks back, and she told me. So, I guess now that the cat's out of the bag, I shouldn't beat around the bush. Is that something you'd be comfortable with?" Trixie asked, fiddling with the corner of her cape.

"W-Well," Sunburst began, trying to keep himself composed as he set the bottle on the drying rack next to the bowl. "Polyamory has been practiced throughout Equestrian history. I suppose it's easier to consider the more comfortable all parties are with each other. When you take that into consideration..." Sunburst paused, thinking to himself for a moment, while Trixie waited semi-anxiously.

"Yeah. The three of us? We're pretty close. I mean, you and I accepted this side of her pretty much without any fuss at all. If we can accept something like that... I mean, why not?"

At last, Trixie gave a hopeful smile.

"So, do you think she'd be alright with it?" She asked.

"Well, based on the past few weeks, seeing how she's gotten during changes... I think playing with her tomorrow is the best chance we'd get at introducing her to the prospect. What do you think?"

The magician gave an enthusiastic nod.

"Let's do it."

Author's Note

Finally got this started tonight. Hope you enjoy, and feedback and suggestions are more than welcome!

And as always, thanks for reading!