Slutty Sister

"I want you to show me how much of a slut you really are" she whispered.
"W-what?"
SLAP!
"Sorry Mistress Lisa....h-how do I show you Mistress Lisa?"
"I'm sure that you will think of something you little whore" and with that Lisa sat down on the edge of her bed and stared at her older, beautiful sister.

Rachel stood for a few moments, thinking, then, very slowly, she lowered her hands to her breasts and started playing with her nipples. When Lisa shook her head and lowered her eyes to Rachel's pussy, Rachel turned red and started to move a hand down to her own snatch. Lisa smiled as her older sister stood infront of her masturbating, and she started to feel horny....very horny. Lisa slid off her pink panties from under her skirt and sat with her legs open. Rachel got the idea.

Rachel moved over to her little sister and asked in a very weak voice "May I play with your vagina Mistress Lisa?"
"Yes you may, ****, and start talking dirty you little whore, no more 'vagina' or anything like that!"

Slowly Rachel dropped to her knees and lowered her head to her sisters pussy. She slid in two fingers and began to lick her and flick into her pussy with her tongue. "Mmmmm, you've done this before havn't you, you little slut?"
"Yes Mistress, I have Mistress." came the muffled reply
Lisa slapped her sister on the ass and said "On the bed bitch, and bend over!"