Later Nightmare woke up and she yawned then she look around were she was at and found bars surrounding her she almost panicked when she thought she was in jail until she looked up and saw a mobile she sighed in relief she was in a crib...wait.
"Oh come on, a cwib!" Nightmare yelled annoyed to nopony in particular she got up onto the side of the crib and looked at the room she was in, it seemed to be a nursery or to better put it, it was a nursery there was a changing table although Nightmare wasn't sure why that was there, a whole bunch of toys in a toy box on the other side of the room, a rocking chair and other things.
Nightmare then noticed the color of the room the wall were midnight blue like Luna's and the carpet in the middle of the room had her cutie mark on it Nightmare looked at her own cutie mark and gasped when she saw instead of her cutie mark she saw a thick diaper around her rump, then the door to the room opened and Luna came in and smiled when she saw that Nightmare was awake.
"Hello Nightmare moon did thy have a good nape?" Luna asked walking up to the crib and ruffling Nightmare's mane.
Nightmare waved the hoof away and looked at Luna pouting, "Stop that and why am I in this nursewy and in a diapie I Nightmawe am not a baby!" she retorted crossing her arms.
Luna continued to smile at how cute Nightmare looked, "When thy saw that you were asleep after changing the night to day I had some servants prepare this room for you," Luna explained, "after I asked them for this they had this room up in seconds and I put the diaper on you then laid you down in here."
Nightmare still pouted, "But why a cwib and a nursewy and diapies, I am not a baby!?" she complained starting to get very fussy without her realizing how childish she was acting then Luna picked her up and cradled her.
"Well for one you are a baby right now and your acting very childish," Luna retorted surprised by Nightmare's behavior then she felt her rump, "and besides if you are a adult and don't need diapers why does your diaper feel so wet now?" she giggled.
Nightmare's eye's grew and she hesitantly shifted around in the diaper and when she felt that it was indeed wet and Luna was right she gasped, "No! that's not possible I didn't even feel it!" she yelled she didn't realize that her eyes were starting to water out of her control.
Luna put her over her shoulder and patted her, "Its okay little one its only natural calm down okay." Luna cooed trying to calm little Nightmare down.
Nightmare sniffled it felt embarrassing to be in a wet diaper in front of Luna but her words calmed her down to her surprise and she stopped crying.
Luna smiled, "That's better now lets get you out that wet thing shall we?" she asked and Nightmare nodded and Luna walked over to the changing table and laid her down then unpinning her diaper Luna removed the soiled garment and threw it into the trash then she went under the table and pulled out a new one.
Nightmare kicked her hooves in defiance, "Nu huh I'm not wearing another diapie evew no I dun need them!" she yelled rolling onto her back and crawling to the side of the table she was preparing to jump until Luna grabbed her in her magic and pulled her back.
"And who was wet when I came to check on her." Luna retorted with a stern look then lifting Nightmare's legs she put the diaper under her and lowered her bottom onto it then tapped it on.
When she was done Nightmare sat up and angrily stared at the diaper like it would instantly combust and she would be free of the thing forever.
Luna then picked her up and smiled, "Okay Nightmare are you hungry." she cooed Nightmare was about to retort until her stomach started to growl and Luna giggled, "I guess that answered that come on we lets get you something to eat.
****
When they got to the dinning hall Luna lowered Nightmare into a dark blue Highchair and sat next to her in her own seat then asked the chefs to bring her some foal food for her when Nightmare heard that she felt disgusted but then looked at Luna.
"Hey Wuna how is it that none of these pony's are afwaid of me?" Nightmare asked she knew pony's can still tell who she is from a few pony's calling her by her name but instead of in terror pony's cooed at her and called her cute.
Luna smiled, "Well I announced your return to everpony in canterlot at first they were all scared," she said then giggled, "but when they all saw you sleeping and sucking your little hoof they all couldn't stop cooing at how cute and possibly harmless you were."
Nightmare's jaw dropped, "You announced my return while I was sweeping and sucking my hoof but what about my image I am the bringer of darkness for Cewestia sakes!" she yelled astonished by this new and by the fact that she suckle her hoof although thinking about it now that didn't sound like a bad idea.
Luna nodded, "Yes if we had to show thy subjects that you are no longer a threat to Equestria," she explained then got up out of her seat, "you wait hear I shall see if the chefs are done with your meal." she said then went to the kitchen.
When Luna left Nightmare smirked this was her chance to escape, concentrating she started to undo the straps to her seat but then gasped, "Wuna put a magical lock on this thing." she said to herself and sighed she was trap she could have tried to break the lock but she could feel her magic was way weaker then Luna's at this size so waiting for Luna to return she sat there.
Her gaze wondered to her hooves and she could feel that urge to suckle them again she looked around to be sure nopony was there then stuck a hoof in her mouth it tasted good and soothing and she suckled it noisily in joying this sensation and smiling.
"Well I have to say that is the cutest thing I have ever seen," said a voice from behind her Nightmare looked behind her to see the older sister Celestia, "well I'm glad your enjoying your stay here by the look of that smile behind that tiny hoof." she cooed.
"Cewestia!?" Nightmare slured behind her hoof then with a pop she removed her hoof and blushed, "W-what awe you doing hewe?" she asked.
"Oh I just came down for a quick slice of cake," Celestia replied but then looked at Nightmare with a smug look and got a little closer, "although I wouldn't mind to stay and watch Luna feed you because I think that would look so cute." she cooed teasing her.
Nightmare scowled, "You go away I dun want you hewe," she commanded then she looked in the other direction to see Luna coming back with there meal, "Woona cant you tell her to go away?" she begged Luna pointing at the sun goddess.
Luna giggled and looked at Celestia and smirked, "Pony gang up style?"
Celestia smired, "Lets do it."
Nightmare groaned, "You have betwayed me for the last time Luna." she said then using her magic she tried to fire of a lightning bolt but found she even couldn't do that and she quickly burnt out and started breathing heavily there was probably a limited about of spell she could possibly do now.
Luna rolled her eyes, "Okay now time to eat." she said then hoofed the bowl of foal food to her sister then taking her own bowl she spooned some of the meal to Nightmare.
Nightmare scrunched up her nose, "What is this?" she asked worried that they maybe trying to poison her.
"Don't worry it's only oat meal, just one bite and thy bet thy shall love it." Luna said trying to comfort Nightmare and spoon her food.
"No I dun want it!" she complained then turned her head when Luna tried to give her the slope but as soon as she did she was met by Celestia who had her on spoon ready for her and she tried to feed her but she avoided It again and turned to Luna, the princesses tried back and forth to feed her but to no avail and she smirked.
Luna thought about it for a minute then came up with a plan, "I know if your still hungry after this i'll give you a nice slice of moon pie."
Nightmare's cat like eyes grew wide, "Weally?" she asked then Luna nodded, "Feed me the slope and you have a deal."
Luna giggled then fed Nightmare the oat meal, to her surprise it tasted pretty good she could taste the apples and cinnamon that was mixed in.
Celestia and Luna from there had no problem feeding Nightmare here meal and then later once she was done a chef came in with the moon pie and hoofed it to Luna who then gave it to Nightmare.
Nightmare shoved the pie right into her mouth making a mess of her face and chopping down on the delicious pie, "Oh sweet goddess that is good pie." she sighed in total bliss.
Celestia shook her head, "What is up with you two and pie?" she asked.
Luna looked at her sister, "Never doubt the power of pie sister."
*****
Later after she got cleaned up Luna took Nightmare up to her room and sat on her bed Nightmare distracted herself with a ball a servant gave her that ironically looked like the moon and she was sitting on the floor pouncing it, she then suddenly stopped to think about something, something that bothered her sense her return then she crawled over to the side of the bed and looked over the side at Luna.
"Hey Woona." Nightmare called.
"Hmm?" Luna said looking at Nightmare from the list of things she had to attend to for the night.
Nightmare felt nervous about what she wanted to say but she had to, "Remember what you and Celestia were talking about before I appeared last night?" she asked
"Yeah I remember why do you ask?"
"Do...do you hate me." Nightmare asked looking a bit scared.
Luna raised a brow then got up onto her haunches and picked Nightmare from over the side onto her lap, "Now why would I hate you." she asked confused.
Nightmare bowed her head rather to proud or to ashamed to say it but somehow she did, "From within your mind I could hear you two tawk about me, how that you don't have to worry that Nightmawe moon is no more than a bad dweam and that she is no more then a holiday for little foaws," she explained her tears starting to flow down her cheek, "and that she should be forgotten and never thought about again!"
Luna was shocked Nightmare moon was...crying, picking her up Luna put Nightmare over her shoulder and patted her, "Hey stop crying its okay," she said trying to comfort her then she sighed, "but you do know what you did was a very bad thing right."
Nightmare looked up from the shoulder at Luna, "But I did it for you," she retorted feeling her bottled up emotions boring out, "your the reason I even exist and the only thing I wanted to do for you was to make you happy and bring eternal darkness for you!"
Luna felt guilty, "But if we had done that one thousand years ago there wouldn't even be anypony here today." she retorted.
Nightmare shook her head, "I don't cawe I wanted to make you happy because...because I wuve you Woona!"
Luna was shocked, "Really?" she asked, Nightmare nodded then cried into Luna's shoulder at her own weakness then Luna started patting her again and she cooed, "Oh I am so sorry Nightmare I never thought about you that way...I promise for now on i'll never try to forget you okay."
Nightmare sniffled and looked up at Luna with big eyes, "Weally?"
Luna smiled and nodded, "Yes I promise and...I love you too." she said sweetly then kissing Nightmare on the head and she hugged her and Nightmare returned the embrace.
Outside in the hall way Celestia watched the whole seen and she giggled, "Well that was a surprise maybe these two will be fine after all." she said then made her way back to her room glad that her spell that makes a pony show there true feeling worked perfectly on Nightmare without her notice.