“We're going to play a little game.”  Kim was still tied to her chair, though Angela had dragged her into the home office, where Angela was now sitting in front of the computer, the locked log in screen displayed on the monitor.  After her bath, Angela had dressed in her sister's lingerie, and she sat in a matching desk chair wearing a black thong adorned with pink bows, and a matching bra.

Sitting on the desk next to the computer was a tray of food Angela had scrounged up in the kitchen.  Angela crossed her legs, popping a grape into her mouth and swiveling to face her captive sister.

“I'm going to take your gag out and ask you some questions.  If you answer correctly, you get rewarded.”  She popped another grape into her mouth, watching Kim stare at her hungrily.  “Good girls get treats, just as bad little girls get punished.  So if you answer incorrectly, you'll go right back to snacking on your panties, and I'm going to take you over my knee and spank your ass raw.”

Kim glared at her.  Her resolve to resist her captor was dissolving, being eaten away by the hunger brought on by the tray of food set tantalizingly before her.  More than anything she eyes the bottle of water Angela had brought.  Her hunger was nothing compared to her thirst, her gag having dried out her mouth and left the worst taste in her mouth.  She surmised that her sister would want passwords for her computer and records, probably her social security number, all the things she would need to adequately impersonate her.

Angela grabbed the edge of the tape unwrapped the sticky stuff from around Kim's face, the helpless girl wincing as she felt it pull out her hair and tug painfully at her skin.  Angela plucked the panties from between her sister's lips, dropping the sodden garment into her diapered lap.  Kim worked her jaw, grateful to be able to suck in clean air through her mouth and to be rid of the awful tasting panties.

“You're not going to get away with this,” she said, licking her lips, still glaring at her captor.  

Angela shrugged.  “No risk, no reward,” perfectly indicating that that line of logic would get them nowhere.  “Now, round one, for the water.  What's your log on password!”  Angela did her best game how host impression, her voice overfull of enthusiasm.

Kim hesitated.  Her sister had guessed correctly that her thirst over weighed her hunger, but the realizing that the answer to that question would only serve to damn her further.  A blush crept back into Kim's cheeks.  

“I'm going to remind out contestant that there is a time limit.”  Angela began humming the jeopardy tune, grabbing the water and waving it in front of her sister.

Kim watched the water bottle, hypnotized by promise of its cool, refreshing bliss.  As Angela neared the end of the tune, she turned the bottle, spilling a little bit of it on the floor.  Kim whimpered, lunging forward in her bonds.

As Angela reached the last few notes, Kim blurted out “lildiapergirl436!”  She was blushing furiously.  Having her nursery discovered was bad.  Being forced into her own diapers was a nightmare.  But having to admit it like that was almost too much.  She felt like she was about to cry again.

Angela couldn't stop laughing, having to put the water bottle down to prevent from spilling it completely as she was wracked with laughter.  “Oh sis, you're just too adorable.”

“Please,” Kim pleaded.  “The water.”

“Gotta make sure it works first.  Now, just so I have it right, spell it out for me.”

Kim hung her head in shame, spelling it out.  Angela purposefully spelled it wrong, getting the error message, forcing her sister to spell it out one more time before finally relenting.  She correctly entered the incriminating password, successfully logging on to the computer.  Satisfied, she held the water bottle up to her sister's lips, and Kim drank thirstily.

“Should I get you one of your baby bottles?” Kim's face burned, but she didn't take her lips from the bottle until Angela took it from her.  She'd drained over half of it.

“Now, for our next round.”  Angela was back in game show host mode.  She produced Kim's purse, pulling out her wallet, and grabbing the first card in she found.  “Personal banking information!”  Angela opened up a web browser and went to the banking site for the card.  

Kim at least had had the good sense to not use her childish password for anything like her banking information or work stuff, so the next impending question wouldn't be as humiliating as having to reveal her personal computer password, but it was a much worse intrusion on a whole different level.  Her money was well divided and invested, so giving her imposter access to her wasn't giving her everything, but it was giving her the freedom to masquerade as her financially for well more than the few weeks she'd promised to stay.

“This next question is for the sandwich.”  Angela held out the BLT she'd prepared.  She took a bite herself, savoring it as she licked mayonnaise sensually off her lips and fingers.  “What is the password to your bank account?”

Kim gulped, torn.  Angela took another bite of the sandwich.  She really didn't want to give her access to her bank accounts, but then it occurred to her that this may offer a ray of hope.  If her doppelganger went on a shopping spree, there was a chance that her bank might see the erratic spending and look into it.  The more eyes on her imposter, the more likely she'd be discovered.

“83HG2FB5T,” Kim said, making an effort to still look begrudging as she divulged her personal information.  

“Oh, an adult password.”  Angela quickly scrawled the password on a notepad she had out, and then tried it, finding it worked.  “I guess the bank probably wouldn't let you have an account if they knew what a baby you were.”

Kim refused to rise to the taunt as Angela fed her the sandwich.  She certainly didn't want to tell her that it was their father who had had told her to change her bank password before he'd died.  It hadn't been related to her love of diapers, but it had been the name of her childhood dog, Barkley, which was still a rather childish password.

Angela held the sandwich out for Kim to eat out of her hand, not caring about the mayonnaise that dripped down her sister's chin or the crumbs that fell onto her breasts and lap, while she looked at the bank statements.  Again she found herself irritated by the extravagance of it all.  Who the hell needed 70 grand in one checking account?

Kim really wanted more water.  The first few bites of the sandwich had satiated her immediate need for food, and Angela's absentminded attempt to feed her was resulting in more food getting all over her than in her mouth, but she was afraid that asking for water would prompt another round of question and answer.  She lucked out though, as the last bit of sandwich was pulled from her.

“Bonus round!  What's your pin number for this card?”  Angela flashed the card in hand.  Kim gave it to her without hesitating, the four digit code joined the growing list of her personal information her sister was stealing from her, and she earned herself another sip of water.

Kim's e-mail, both work and personal, her facebook information, her social security number, her car insurance information, all wound up on the ever growing pad of her personal information.  Kim was no longer hungry, even though the tray of food was still almost half full, but she continued to answer without resistance.  Each additional question just seemed like a silly place to draw the line and put her foot down, after she'd already allowed open access to her computer and bank account information.  Most of the passwords were saved on her browsers, and Angela didn't even need to interrogate her to access it from her own computer.  Angela had even gotten her generic answers for her “forgot your password” prompts: her childhood best friend, first pet, all that, so she easily piece together all the information she wanted.  

“Looks like we're going to have to find a new reward.” Angela said, noticing Kim's growing lack of interest in the food.  She herself was getting bored of the game.  She'd stopped the game show host schtick awhile ago.  Kim was being more compliant than she'd expected, given her mild attempt at defiance when she'd first woken up in the bathroom and Angela had laid down her options.  On one hand, it was a relief, she was getting what she wanted, but she couldn't help but be a bit disappointed.  The prospect of having to break her sister in was exciting.  Compared to the thrill she'd gotten in the initial abduction, fooling the neighbor, even Kim's near escape, hectic and dangerous as it had been, had been a rush.  Hand feeding her sister like some bird while she gave out passwords hadn't been quite the exciting conclusion to her first night as she'd hoped.

“You could let me go,” Kim said dryly.

“Don't be silly.”  Angela patted her on the head.  Kim felt like growling at her, but held it back, knowing it wouldn't help her distaste of being treating like some animal.

“I have an idea.  Don't go anywhere.”  Angela got up, heading out of the room, leaving Kim alone.  

Kim was alone and ungagged for the first time since her earlier escape attempt.  Had she known that her frantic screams for help then had attracted her neighbor, she might have tried that again.  Instead, she focused her attentions on the computer.  Sliding the chair around by throwing her weight around had gotten her nowhere on the tiled floor of the bathroom, and logic dictated that the carpeted floor of the home office would be even more resistant to her attempts to move, but she gave it her all anyways.  The computer was right there.  If she could reach it, maybe she could lean over far enough to reach the keyboard or something.  Any sort of plan was better than just sitting there, waiting for her captor to return to steal more of her identity away from her.

She succeeded only in bouncing her tits around, shaking the crumbs off of them onto her lap and the floor.  Her maid was going to wonder what the fuck she was doing in here, she thought.

The Maid!

Luisa was her personal housekeeper.  She came every Thursday to tidy up the house.  She had her own key and the alarm codes and everything.  

And Angela didn't know about her!

If her captor didn't specifically ask her, she wasn't obligated to tell her anything to help her get away with her crazy plan.

Granted, Thursday was still six days away, but she was slowly starting to accumulate little bits of hope.  First the idea of her bank suspecting fraud if Angela went overboard with her money, and now Luisa coming in less than a week, unannounced, unexpected.  Getting to the computer, a pipe dream she now realized, seemed a little less imperative, and she allowed herself to relax in her bonds and wait for whatever “reward” her sister came back with.

Angela returned, holding one arm behind her back, concealing what was presumably the new reward from her captive, and carry a moist washcloth, which she began cleaning up the messy Kim.

“Now, part one of the game has been kind of boring, because it's been all business.  All the little details, passwords and numbers and such.  That's not helping me get to know you.”  Kim was apprehensive, trying to sit still as her face and chest was roughly wiped clean.  “For the final round of the evening, with a special reward, I want your diary.”

Kim was shocked.  This was a breach well beyond anything else she'd been forced to do so far.  “What?  No!” Kim blurted.

“Oh come on, I know you have one.”  She had in fact already briefly searched through Kim's bedroom for it.  It was where she had found the “reward” she still had stashed behind her back.  “Oh I get it, you want to make sure the prize is worth it.”  

Kim was stunned to find Angela climbing up onto her lap, her sister's bare thighs perched atop her own.  Her eyes widened when Angela removed the object from behind her back.  It was Kim's own vibrating wand, the one she kept stashed in the bottom drawer of her nightstand.

“I don't have one,” Kim stammered.

“I don't believe you,” Angela said, leaning up against her sister.  Kim could feel her breath against her, hot and warm.

“I swear, I haven't kept a diary since I was like fifteen,” Kim's breath was quickening.

Angela leaned in until her lips were almost touching Kim's.  “Bullshit.”  Kim pulled back reflexively, but there was only so much room.  It only prompted Angela to lean in further.  The chair creaked as it came dangerously close to falling backwards.

“Girl like you, I guarantee you have a diary somewhere.  Your laptop's in the office, not your bedroom, or even your nursery, so it's an actual diary, somewhere in this house.  Now, I could tear this place apart until I find it, but this, this is just so much more fun.”

Kim gritted her teeth, trying to buck backwards in an attempt to overbalance the chair, but it, like everything else in the house, cost a ridiculous amount of money for a reason, and it wasn't tipping easily.  She felt Angela bring the head of the vibrator to her heavily padded crotch, and immediately began it's familiar buzzing.  She started to protest, only to have the washcloth Angela had used to wipe her face crammed into her mouth.  She should've been grateful it wasn't her panties again, but the washcloth was much larger, and the large wad jacked her jaw open, and without help, she found it impossible to dislodge her new improvised gag.

“Shhh,” Angela whispered into her ear.  “You can tell me when you're ready.”

With the diaper in between her and the wand, it wasn't doing much, but Angela cranked it up a notch, suddenly pushing it deep into the padding.  Angela's free hand found Kim's breast, and she brought her mouth to her ear.  She ran her tongue around Kim' earlobe, then tugging gently on Kim's ear ring with her teeth, while her hand messaged her breast, rolling her quickly hardening nipples between her thumb and forefinger.  

Kim couldn't help but feel aroused by her treatment, her helpless body betraying her as it succumbed to her sister's sensual touch.  Her diapers had never been a sexual thing for her.  It was about entering a simpler place, where the stresses of her adult life didn't reach her, and sex was one of those adult stresses that didn't follow her when she put on a diaper and let herself regress.  But now she was undeniably turned on.  The vibrator jammed into her padded crotch felt amazing.  She moaned, trying to keep her body under her own control, turning her head away as if looking away would somehow make it as if it wasn't happening.  It only allowed Angela better access to her neck, and she began kissing her sister's neck, moving slowly downwards to her breast that wasn't currently being fondled.

Angela was relentless.  This was not her first time in the driver seat with another woman, and while she'd done some light bondage sessions before, it was nothing like this.  She had complete and total control.  Angela briefly let off the pressure on the vibrator, and her sister's mmmph of disappointment let her know she was ready.  Angela turned the vibrator down to low again, and shoved it down the front of Kim' diaper, so it was nestled snugly against her pussy.  Giving her nipple one last gentle nip, she sat up, and pulled the washcloth out of Kim's mouth.

“So,” she purred.  “Where's that diary?”

Kim let out a low moan as the vibrator shifted against her.  She wanted an orgasm.  She didn't think she'd ever wanted to climax so bad in her life.  She knew what she had to do to finish, but she fought to get a hold on herself.  “Go to hell,” She growled, and then spit in her sister's surprised face.

Angela recoiled, nearly falling off of her twin's lap.  She collected herself quickly, wiping the spit off her face calmly with the washcloth before viciously ramming it back into Kim's mouth.  She turned the vibrator off and removed it from Kim's diaper, dropping it on the floor, before getting to her feet.  “Punishment it is then.”  Her voice had lost its sensual, sexual tone, and had dropped to a cold, dangerous octave.

Kim was grateful for the gag, cause staring into her sister's eyes then she was sure if she'd been allowed to speak she would have cracked.  She'd been so preoccupied in not giving in to the wanted pleasure that she had forgotten the other side of the game.  Bad little girls get punished.

Angela ripped off the belt of tape holding Kim to the back of the chair and lifted her off the seat.  Angela sat in her own chair and pulled the struggling girl over her lap.  Kim thrashed around like a fish on a line, but with her legs still bound to the base of the chair and Angela holding her firmly in place with one hand, her struggles were useless.

Kim pleaded impotently into her gag, trying desperately to maneuver herself so she could look back at what was happening, but she was stuck staring at the ground.  She felt the sudden rush of cold air on her backside as her diaper was yanked down her thighs.  It should have felt good, after being trapped in the hot, stifling garment for hours, but the fear of what was coming overrode any enjoyment she could possibly take.

She braced herself for the inevitable.  She'd never been spanked before, no even as a child, and it definitely wasn't part of her adult baby fantasy.  She'd never had a high tolerance for pain, and she knew her tormentor was not likely to hold anything back.

*WHAP*

Even fully expecting it, Kim was amazed at how much it hurt when Angela brought her palm down on her bare ass.  She didn't even have time to recover as the next blow landed, her cheeks still stinging from the first strike.  Kim bit into her gag even as she screamed through it in pure agony.  

Angela kept the blows raining, alternating between cheeks, making sure not to ignore the soft flesh of the back of her thighs.  Her palm was on fire, she couldn't even imagine what Kim's ass must have felt like.  Her struggles had turned into limp reflexive wincing, and she was bawling behind her gag, tears and snot and drool falling from her face onto the floor.

Finally, Angela relented, sitting back, spent.  Kim lay limp across her lap, softly sobbing, her ass now a glowing red.  She whimpered softly as Angela pulled the diaper back up over her throbbing ass, and helped her back into her seat.  Even with the extra padding of the diaper, Kim squealed as she was sat down.

“Now,” Angela said, once more pulling the washcloth out of Kim's mouth.  “Do you have something you want to tell me?”

“There's a safe,” she blubbered, still sobbing.  “In my room, behind a painting of a cathedral.”  

Angela wiped her face for her, holding the cloth up for her to blow her nose.  “Code?”

“75923.  My diary's in there, passport, birth certificate, some of my step mom's jewelery.”

“Good girl.”  Angela wrote down the password on her pad.  “I believe that's enough for tonight.  It's probably way past your bedtime anyways.”

Kim nodded meekly.  Despite whatever sleeping conditions her sister had planned for her, she was exhausted, and if posed with the option between freedom or sleep at that moment, her answer just might have been sleep.  She shifted uncomfortably in her seat, trying to take some of the weight off her ass, as Angela got up and started wheeling her back to the nursery.