A lock screen and some turned tables

Chloe grabbed the phone from Lily's outstretched hand, happy to finally be taking some control of her situation. However, as soon as she brought the phone in front of her, a lock screen appeared. She looked from the phone screen back to Lily, suspicious. "It won't let me in. How do I unlock this?"

Lily stepped next to Chloe, reading the message over her shoulder - Unauthorised User Detected. "Hand it back, let me have a look."

Chloe hesitated for a moment, frustrated, before thrusting the phone back towards Lily. As soon it was in Lily's hands, the lock screen disappeared. "Allow user Chloe Goodwin access to Group Conformity?" the app prompted, complete with a button to set access settings. Lily clicked the settings button, and was soon given a wide array of options to choose from.

Chloe quickly grew impatient. "What's taking so long?"

"Looks like I have to grant you permissions. There's a lot."

"Quit stalling, just make me an admin or something. Hurry up."

Lily sighed. She was still taking in all the options, and she'd barely made it through the awareness section. Chloe would have to wait. Lily couldn't see options for individual rules, but she could limit Chloe's rule visibility to the last 12 hours. Would that be enough? It should skip the start of the party, but she'd still need to have the apology rule in the list or Chloe would get suspicious.

Chloe started to shift anxiously from foot to foot as she waited, her naked breasts shifting gently with each step. As she waited for Lily to finish with the app, suddenly, an idea struck her. "I know. Lily, sexily hit the accept button for me."

Lily was aghast as her hands betrayed her, abandoning the settings and bringing her right index finger to her mouth. Lily felt her tongue stick out, wetting her finger as it ran across her parted lips and dipped into her mouth, before trailing down the side of her face and chest, leaving a trail of saliva in its wake. As her finger circled her nipple over her t-shirt and made its way to the phone button, Lily cringed as she pressed firmly down on the accept button, granting Chloe broad access to the app, including a lot of settings she hadn't yet had a chance to alter.

"Well that wasn't fair," Lily started, annoyed.

"Oh, you want to talk about fair?" Chloe retorted, gesturing down to her naked form. "Hand me the phone, Lily."

Defeated, Lily handed the phone back to Chloe, not wanting to be given any more commands, in case Chloe decided to add something else.

Chloe immediately took the phone and started navigating the app. "You didn't tell me about this rule..."

Lily swallowed, wondering how many of her rules Chloe could see, and fearing the worst.

"Just to double check, your middle name is Rose, right?" Chloe asked, with a smirk.

Lily's eyes widened as she felt her hands reach down and lift the base of her t-shirt up just below her chin. Despite Chloe's nudity, and her own earlier display, Lily felt herself flush with embarrassment as she was **** to display her large breasts for Chloe.

"Well, that certainly still works." Chloe quipped, then looked confused. "I can remember you making me flash you at the party now. Why did it seem completely normal until I read this rule?" Chloe punctuated her sentence by reaching out and groping Lily's left breast, compelled by one of Lily's other rules that Chloe didn't know about.

"I-I'm not sure" Lily stammered, feeling Chloe's cool hand squeezing her boob. Eventually, she could drop the edge of her t-shirt, leaving it hanging loosely with Chloe's hand caressing her underneath. "I guess you won't recognise a rule is strange until you read it?"

"Great," Chloe sighed, sarcastically. "I can't believe your first thoughts were to make me flash you, and then trick me into apologising."

"I was just messing around, I thought it was a prank." Lily lied, her mind drifting back to last night with Chloe.

"Now I have to be careful around anyone saying Aurora."

"At least it's not as common as Rose." Lily replied, then immediately regretted it as she felt her hands return to again lift her T-shirt. "I guess I can't even say it myself. You're lucky you're already nude."

"Yeah, lucky." Chloe's hand continued to grope Lily's breast, her thumb brushing over Lily's left nipple. "So tell me how to delete the rule, and we'll both be free."

"I already told you, you can't. There's a help icon at the bottom."

With a sigh, Chloe searched the app, and as Lily had said, discovered a rule only becomes invalid if the user is no longer a target.

"Maybe we can make the rules invalid. If we kick you out of the sorority, the rules can't affect you."

"You want me out of the sorority?" Lily responded, a little hurt, and afraid to lose her control so quickly.

"You're not exactly in my good books at the moment." Chloe punctuated her point by pinching Lily's nipple, hard. "Besides, this might be the only way around the rules."

Lily winced as Chloe twisted her nipple further. "There has to be another way!" she protested desperately, "Maybe another rule can fix it."

Lily reached for the phone, but Chloe quickly pulled it away, clamping down hard on Lily's nipple with her other hand. Lily yelled out in pain.

"Oh no, no more rules from you." Chloe said tersely. "I think maybe I'll try and come up with a solution."

Lily absentmindedly toyed with Lily's sore nipple as she pressed and typed on the phone for a minute, before frowning and turning to Lily.

"I thought you said you had to include yourself in the rules. I tried making a rule for senior sorority members, but I couldn't. So if the User isn't me..."

Lily realised what was happening the same time as Chloe. Chloe didn't have her own version of the app, she had Lily's app. The rules she wrote would have to affect Lily. Lily needed to get the phone back before Chloe could do something dangerous.

What Lily tried to say next was "Chloe, sexily hand me back the phone", but what she found herself saying was "Chloe, may I make a sexual request?"

Chloe laughed. "My, how formal. Trying to take control again, Lily? How do you like my new rule: Little sisters must ask a big sisters' permission before making any sexual request of them. That should solve our little power dynamic."

Lily started to panic as Chloe's hand firmly squeezed her breast. "Chloe, you have to be careful, these rules could be permanent."

"Careful, like you were?" Chloe responded, her words laced with acid, "Don't worry, my new rule doesn't stop me from giving you orders. It's only to stop you from doing anything stupid."

Lily struggled to think. How could she have been so stupid? There had to be a way out of this, maybe she could steal the phone back, or-

"We should keep your hands busy, so you're not tempted to try and take control again. It's a shame it has to be sexual, but, oh, I know, Lily, every time you think about grabbing your phone, I want you to spank yourself instead."

Lily's heart sank, as she felt her right hand lift, and then sharply swat her own right butt cheek. Chloe snorted as Lily repeated this action several times, trying to think of a way around it, before eventually giving up.

Satisfied, Chloe returned to the app, pressing buttons Lily couldn't see.

"You know what, Lily, I think you're right. We shouldn't be so quick to kick you out of the sorority," Chloe said, sinisterly, "After all, I can already think of all kinds of fun rules we can get you to follow."