As happy as Eva was that she had quickly become a Pokémon card game master and gotten great friends including one who could spend the night with her while her parents were out of town, She was less then thrilled by the fact that her mother had mentioned her special overnight undies before leaving, and the fact that said friend who was spending the night wouldn't stop talking about said special overnight undies: Celestine.
"So are they full on diapers or just pull ups? Oh! Or washable training panties?!" The purple haired bigger girl asked, a look of utter glee on her face as Eva huffed and blushed brightly. 
"they 'none of your gosh darn business' that's what they are!' She huffed and pouted. 
"Aww come on, I'm gonna see them when you go nighty night so you might as well tell me.. Unless your already wearing one!" Celestine said and reached to tug the back of Eva's light green jammie bottoms away as the smaller girl yelped and did the only thing she could: reaching around and yanks up the ghost Pokémon print boxers shorts Celestine was wearing for bedtime up and giving the ghost user a wedgie. 
"Son of a- The heck!?!" Celestine asked, wincing and stepping back, yanking her boxer shorts out of her crack and making a funny face that had Eva snickering now. 
"Sorry, but you were about to cross a line." Eva said and as Celestine finally got her undies out of her crack she went on. "Since it's clear your not gonna drop this.. how about we settle this with a match? If I win, you stop bugging me.. and I get to give you three more wedgies because you 'ow my crack' face is just too funny!" 
"..If that's the way you wanna play it.. fine. but when I win not only do I get the truth out of you, But I get to spank your butt for the wedgie AND you spend the rest of the night with your special overnight undies on display!" Celestine said, smirking and holding out her hand. "Deal?"
Eva smirked, she knew she could take Celestine 4 out of 5 times so wasn't too worried and went to shake Celestine's hand as the goth quickly added. 
"Oh and a one and done match!" as Eva's hand shook hers. 
"..that was dirty." Eva huffed, suddenly NOT as sure about her chances, but it was too late, the girls had a game to play that neither of them could really afford to lose.

Not even 50 seconds later and Eva was done, a horrible first draw on her side and a excellent one for Celestine meant she was trashed crumpled up and tossed in no time flat and now found herself sweat dropping and trying to get out of the bet. 
"you know.. A LOT of things were said and done.. and you know I would of never ACTUALLY wedgie you right?" Eva said, poking her index fingers together. 
"ah ah ah, no take backies. You can speak up now and tell me the truth and I'll go easy on your buns, orrr you can decide to spill the beans after I smack that butt but it'll hurt more." Celestine said, going and getting a wooden spoon from the kitchen as Eva started to pale. 
"AH NO WOODEN SPOON! MY BUNS ARE TOO SENSTIVE FOR THAT!! THATS WHY I NEED LOTS OF BABY POWDER WHEN I WEAR MY PULL-UPS FOR MY BEDWETTING!" Eva shrieked, waving her hands back and forth and shaking her head no. 
"Heh. Ok then. hands only it is." Celestine said, setting the spoon down and then taking Eva's hand and walking over to the couch.
"..You.. were never gonna use the spoon were you?" Eva whined, face palming. 
"Nope. but I find it motivates the truth MUCH faster." Celestine said, grinning ear to ear and tugging down Eva's jammies and snorting, the local Pokémon champ was in oddish themed pull-up's. "Very cute and VERY you~"
"S-shut up and just get this over with." 

Laying over the lap of the bigger and stronger girl, Eva's tummy was full of butterfree's as her pull-up had been pulled down and her cheeks were exposed for Celestine to see (well semi, there was a thick coating of baby powder on the cheeks)
"P-Please don't go hard, I've never been spanked before!" Eva whined, and got a hand rubbing her lower back in response and then CRACK, Celestine's hand came down over her cheeks and there was a sharp pain but.. it wasn't that bad. 
"Sorry little girl, but I'm going all out with all 10 of your swats!" Celestine said, with a wicked grin on her face. 
'all.. out? but that didn't even..' Eva thought and then a second swat came down, knocking baby powder in the air and again, there was a sharp pain but then a semi warm feeling that Eva kinda liked. 
Still, Eva wasn't dumb and didn't wanna bring the wooden spoon back into play and recalling how she'd seen spankings playing out on tv, she started to cry out and kick her legs and flail her arms as Celestine laughed and kept swatting away. 
'huh, guess either my butt's tougher then I thought or I like this stuff. either way, learned something knew about myself tonight.' 

Celestine wasn't stupid, she knew that Eva was enjoying the spanking and was just hamming it up, and toyed with actually going all out on the little brats butt for a second, buttt noting how into it Eva was getting Celestine decided to let the little spank baby think she had buns of steel as she finished up the half power swats, having to cover her mouth and nose with one arm while swatting from all the baby powder going up in the air. 
As she finished up with the last swats she knocked enough of the baby powder had come off to show Eva's turning rosy cheeks and was again tempted to take this into over time.. but then recalled how going all in with the first spanking had cost her other spank babies before and reigned herself in. 
'Easy Celestine, it's a marathon not a dash.' She told herself and stopped, a -gush- cute little whimper of disappointment coming from Eva as she stopped. 
"I-Is that ten already? I uh.. think you miscounted." She said, making sure not to look at Celestine but the bigger girl could feel the heat of the blush building up. 
"Oh? Maybe your right.. how many swats do you think i missed?" Celestine asked, her voice FULL of amusement, letting Eva know even it it wasn't being said she knew what the baby was really asking for.
"Gosh er.. I think you forgot to do.. 5 of them?" Eva said/asked. 
"Hmmm sounds about right but I better double that, just to be safe of course. No complaints I hope?" Celestine said, smirking. 
"Well gosh darn it, I sure do hate this but I know I gotta take my licking like a good girl." Eva said, her legs kicking with excitement now and she was grinning like the Cheshire cat. 
"heh. Yup. your SO brave taking this 'extra' punishment." Celestine said and then started to wail away on Eva's butt to make up for the 'missed' swats though somehow, she would end up 'miscounting' three more times before it was all said and done. 
Go figure.

with her buns only a little tender and in just her jammie top and 3 of her pull-ups (Celestine said she wanted to have lots of padding on Eva's tender cheeks, Eva was more sure Celestine just wanted her full on padded) Eva was snuggled into Celestine's chest and sucking on a ice pop while the pair watched some ancient VHS tapes (they'd had to go into the attic to even find a VHS) of the Pokémon series and were snorting about how cheesy and silly it was. 
Still, watching the old anime and having fun singing along with the poke rap, the girls had a nice night and Eva knew without it being said that she's be getting spankings and wearing bulky padding a LOT more often from now on.
'I wonder if I should tell her about the old cloth diapers and rubber pants I found up in the attic last time I was at grandma's that I think were moms? ...eh, stuff to think about anther day.' Eva thought as she finished her ice pop and let out a belch, then snuggled into Celestine and drifted off to sleep. 
a move that had Celestine almost melting from how cute and adorable it was AND how awesome it made her feel.
'Ok, next sleepover, we do it over at my house, my old crib is in the attic, she's small enough to fit in there and I have some old diapers that should fit if I make add some tape..' Celestine started to plot out, making it clear Eva wasn't the only one looking forward to the next sleepover. 

the end