"Why the long face, Roz?  Bad day?  Maybe your cunning plan to ruin your sister by scoring her a date fell through at the last minute?"

"Shut up Mary, just shut up."  Roz flopped down on her bed and covered her head with a pillow.  "You have no idea how angry I am right now and if you keep pushing me I'll make Ruth look like Mr. Rogers."

"Well, one can only pray that you'll be committed to a psych ward soon."

Roz threw the pillow at Mary and stormed up to her, ripping the book from her hands and pressing their faces together.  "Look you little piece of shit, say one more word and I'll come down on you like the wrath of your God.  I know what Billie has over you, I could beat you bloody and everyone would say you fell on a doorknob!  One.  More.  Word."

Mary's lip trembled for an instant before she steeled herself.  "Do it."

Taken aback, Roz stepped away from Mary, her mouth slightly agape with shock, "What?"

"Do it, that's what you want isn't it?  To ruin me?  To see me broken and bloody in front of the whole world."

Roz turned to the door, "Fuck it, I'm not playing headgames with you."

"I mean it," Mary said, stopping Roz as she reached for the door handle.  Standing up, Mary spread her arms wide, "Take your best shot, I want you to.  I want to hurt, to be abused, I want to be laid low by you.  Debase me!  Corrupt me!"

"This is fucked...up..." Roz trailed off as Mary undid her pants and let them fall to the floor.  Approaching Roz she slid her hands under her top and pulled her panties to her ankles, kicking them aside as she sauntered closer to Roz, her top barely preserving any modesty she had left.

Placing both hands on either side of Roz, Mary bit her lip and looked into Roz's eyes, "Don't you want to be my god?"  Roz's hand fell from the doorknob and Mary smiled as she unbuttoned the top of Roz's jeans and slid her hand down them.

"St-Stop!" panted Roz as Mary's fingers slipped through her pubes and buried themselves in her slit.

"Not until you make me."

"I don't this."

"Liar," cooed Mary as Roz's juices coated Mary's fingers.  "One specific word and I'll stop, get dressed, and pretend this never happened.  All you have to say is two letters."

"N-n-n..." Roz trailed off with a whimper.

Pulling Roz's pants to the floor Mary slipped two fingers inside, Roz's snatch gripping them tightly as the entered while Mary's thumb kept pressure on her clit.  As she put her hand on Mary's shoulder to steady herself, she felt a twinge of fear as she met Mary's steely gaze, a piercing mix of lust and hate that sent a shiver down her spine.  Roz's breath turned to ragged pants as Mary began rocking her hand back and forth, building a tingling heat deep in Roz.

"You're going to have to tell me what to do," said Mary with a hint of sadistic glee, "I'm a good Christian girl, we aren't supposed to know about these things."

"Kiss me!" stammered Roz and pulled Mary close.  As their lips found each other Roz slide her tongue between them and Mary eagerly reciprocated, twirling against the other as Roz's hand slid down Mary's back and slipped between her ass.  Roz could feel Mary twitch in her arms as her fingertips brushed Mary's neglected pussy, gently teasing the small girl with delicate strokes and shallow insertions.

"I'm not supposed to get what I want, remember?" said Mary as she guided Roz's hand to her mouth and licked the fingers clean of her juices.  Barely cognizant, Roz nodded in agreement, sweat flying off her flushed face as Mary smiled a wicked smile at her.  Pulling Mary in tight, Roz moaned loud as her legs gave out, sending both of the girls into a heap on floor as Roz's orgasm wracked her body; Mary's fingers driving the sensations higher and higher until Roz's moans turned to a scream that Mary cut off with a kiss.