Bored Little Girl/Paper
Jackie throws rock. You win!
"Yay!" you exclaim, as Jackie brings her fist to her face and groans. "Alright, come on, sis. You know the rules!"
"Jeez, you're impatient", says Jackie, reluctantly standing up.
You stand to face her, then take your time walking around her back. She rolls her eyes, but you don't care. You're going to enjoy this.
"Ready?"
Jackie clasps her hands in front of her. "Ready."
You bring your fingers as close to Jackie's dress as you can without touching her. You can't wait to get your hands on those cute panties you saw earlier. You're ready to pounce the moment your sister starts counting and when she suddenly begins, trying to blurt out "One Mississippi" with a speed that would put auctioneers to shame, you're under her dress grabbing for the waistband of her panties. Your touch makes her yelp, which only works to your advantage as it slows down her counting. Your fingers brush over her soft skin before closing around the thin cotton of her panties.
You yank up viciously, causing the panties to sink deep into her crack, interrupting her counting again as the word "two" turns into a moan. You giggle as you momentarily release to get a better grip and then resume yanking up as hard as you can. Your sister steels herself and counts through the pain of her panties digging into her asshole. As you continue pulling up she goes onto her tiptoes and you feel like if you were just a bit stronger you would be able to pull her right off the ground.
She manages to get to the fifth "Mississippi" before any ripping happens and you let go. She immediately drops to her hands and knees on the pillows in front of her, which happens to make her skirt flip up onto her back and gives you a great view of the damage you caused. The white fabric was hiked high up her sides, and formed a tall "V" until it disappeared between her pale cheeks. As she leaned forward even more, her cheeks opened up, showing the tight bunch that her panties had been reduced to that was splitting her ass and, as you were delighted to see, her pussy lips. You could see her hand come up under her, moving her dress out of the way to massage her pained privates. You admire how puffy her outer labia are and wish it could be your hand rubbing them. You notice for the first time your sister's pubic hair, too, with a few curls of hair a slightly darker blond than those on her head peeking out from her panties.
Keeping her hand pressed to her pussy, she gets up, apparently unaware or unworried that she had just given you the type of show you'd only ever seen before in dirty videos.
"Okay, you got me good, sis", she says, a smile forming again on her face through winces of pain. "But I'm not done yet!"
"I would hope not. I'm only getting started!" you respond, readying yourself in front of her again.
"Rock, paper, scissors!"