Sunny wasn't sure what was more impressive; the fact that neither Zipp nor Izzy seemed to be fazed by the stench of her well-used diaper as the three of them sat at the kitchen table eating dinner, or the battery life of the vibrator that was still inside her since this morning. Her two caretakers hadn't been so merciless as to have it on all day, but the pair had swapped the remote throughout the day, and never let the earth mare forget about the vibrator inside her for too long. By now, Sunny couldn't be sure what had made the diaper more wet; her urine, or her arousal. Not to mention that every time she even slightly shifted in her seat, she felt the muck in the back of her diaper shift with her. She took some satisfaction knowing that one of them was going to have to get her cleaned up after dinner.

She was glad to be able to sleep in their new nursery tonight, and she was really hoping her marefriend and her 'big sister' had a reward in mind for this little endurance test they had put her through.

With a final bite of strawberries, almonds, and salad greens from her bowl, she was finally finished, and patiently waited for Zipp and Izzy to finish theirs. Luckily they weren't too far behind.

"Alright, I think a certain little filly needs a bath..." Izzy said as she got up and levitated everypony's dishes over to the sink.

"Certainly smells like it to me," Zipp agreed, smirking over at the earth mare.

One of the favorite things Sunny had loved about the last two days was how Izzy had gotten rather good at picking her up in her magic to take her wherever she liked, and right now was no different, as she felt herself go weightless as she was lifted up and levitated away from the kitchen over to the bathroom. She was gently laid down on the bathroom rug, and Izzy went about untaping her diaper while Zipp got the water running and to the right temperature.

"What a stinky filly we have tonight!" Izzy commented as she got as much of the manure off with the cool wet wipes as she could, before pulling out the egg vibrator that had been in her for most of the day, setting it aside for cleaning later. It wasn't perfect, but it was enough to magically pick her up off of the used diaper, turn her over, and stood her in the hoof-high water that was in the bottom of the tub. Zipp, who had been standing by with the detachable shower head, began spraying her down as soon as Izzy lifted her tail up out of the way. In a few moments, her rump was dripping wet and clean, so Zipp closed the drain and dribbled in some bubble bath.

"And now for the rest of ya," Zipp commented. It took a couple minutes for the water to get up to Sunny's barrel after she sat down, then Izzy took the shower head and sprayed down her marefriend's head and down her neck, before grabbing the shampoo and dribbling it onto her mane.

Sunny just sat there in bliss as her marefriend washed her mane, while Zipp rolled up the diaper and took it back to the nursery for disposal.

"I don't need to do it all, Sunny, come on now, get to the rest of you," Izzy said, passing her a wash cloth with her magic. "And don't get any funny ideas, I'm watching those hooves."

Sunny blushed as she got the cloth soaked and drizzled on some coat wash, beginning to wash her legs, barrel, and stomach. A couple minutes later, Izzy pulled the plug, stood the earth mare up, and sprayed off all the suds as the water drained around her hooves. Once the tub was empty, Sunny stepped out onto the bathroom rug dripping wet. Izzy tossed her a fresh towel from the linen closet, and then grabbed a hot air dryer and a brush. Five minutes later, Sunny was clean, dry, and was taken back to the nursery, where Zipp was waiting next to the changing table with a fresh diaper and changing supplies.

"Alright, Sunny, are you ready for bedtime?" Zipp asked. The corners of her lips curved up just slightly into a small smile as Sunny's face shifted to an almost pleading expression.

"N-no, please big sis..." Sunny answered.

"Well, what could possibly be left to do tonight, hmm?" Izzy said, coming up and standing next to Zipp at the changing table.

"Big sis promised a reward for putting me through that test today," Sunny reminded them.

"Hm... I suppose I did, didn't I? What do you think we should do for a reward, Izzy?" Zipp asked.

"Yeah, I suppose she did do pretty good today," Izzy agreed. "Is there anything in particular you want?" The unicorn asked.

Sunny felt heat flush into her face as she fumbled with her words. They were actually going to make her say it.

"Come on, little Sunny. Use your words," Izzy encouraged.

Sunny took a deep, quiet breath.

"P-Please, mommy. Let me sparkle," Sunny said, almost forcing the words out of her mouth.

The smiles on the unicorn and pegasus widened simultaneously.

"What a good girl, letting us know exactly what you want. I suppose we can do that and help you get a good night's sleep before you start up your smoothie cart again tomorrow," Zipp said.

Most of the nursery floor was taken up by the interlocking foam tiles, and this was exactly where Izzy laid her down, right in the middle of the room, before quickly trotting out of the nursery and upstairs. Sunny stared up at the ceiling, where she had put up dozens and dozens of glow in the dark stars up with bits of adhesive putty. Zipp had barely got down in between her back legs, gotten the clean diaper slid underneath and fastened around her tail before Izzy had come back into the doorway.

"Just one thing to do before we get that diaper on you, little Sunny," Izzy said.

Sunny pulled her gaze away from the ceiling, and her heart skipped a beat when she laid eyes on her marefriend, and her eyes had immediately fallen down to between the unicorn's back legs, where she had put on a well-endowed strap-on, looking like it was already shiny with a coating of lube.

Sunny's eyes widened at what was about to happen to her.

Author's Note