Hot Summer Job/Cut up your sister's suit
You stare longingly at your sister's inviting pussy mound wrapped up in tight lycra. You can't stand to see it so nearly on display while still so inaccessible. You need to fuck up this suit.
You pinch the fabric mid-pelvis and make a quick incision. From there you cut left and right, up to but stopping short of the elastic hem. Your fingers then deftly slip up under one leg hole of the suit, the backs of your fingers brushing right over your sister's vulva. Bree squirms a bit while still holding her little lapels, but she hardly does anything to stop you. Cutting down just inside the hem, you slice open the left side of the crotch of her turquoise suit, followed promptly by the right side. With some slightly sloppy scissoring and yanking of fabric, you make short work of the two inch wide strip of fabric nestled between her legs, tearing it out from under her.
You pull back after to inspect your work. Your sister's slightly puffy little lips are no longer wedgied by tight spandex. Instead they're hugged on either side by green elastic, digging deep into the inner edge of her thighs. Her entire pussy is now plainly visible. The hood of her clit acts as a tiny exclamation point that only helps draw attention to her hairless mound.
Maybe that was a little much.
You finally glance up at Bree who is looking down at you wide-eyed, blushing fiercely. "Is this... sexy?" she asks with uncertainty.
"Oh, uh... more or less. But less is more, right? So we can make it even sexier!"
Standing, you shoo your sister's hands away from her lapels then slip your scissors into that initial cut you made. You aim downward, deepening the cut inch by inch. Just above her belly button you rotate the blade, quickly curving out to one side. You lift Bree's arm and follow the scissors as they do all the work. Finding the small of Bree's back, you turn upward and slice cleanly through the center of Bree's suit, directly between her shoulder blades. You only realize how badly your excitement got the better of you when you see a quarter of Bree's suit hanging freely from her shoulder. There's nothing holding this in place now. For good measure, you cut the strap holding it up and watch it all fall away effortlessly. Bree's left hip is still covered, but her left chest, back, and nearly entire left side is exposed to the air. You turn her around to face you, really taking in your handiwork.
"Riley!" complains your sister. She has a silly grin on her face, but there's annoyance in there too. Her hands gradually drift in front of her bared pussy. Losing even more of her suit is making Bree increasingly embarrassed, but by the looks of it a little giddy too.
"Don't worry. We're not done yet!"
You look over what's left of Bree's swimming suit. There's a surprising amount of material intact given what modesty you've taken away, but you're afraid the suit will fall apart completely if you keep going at it so recklessly. You also don't want to bully your sister into quitting. So you pull back a little, trying to be more considerate. You contemplate trimming the lone lapel away from her chest, but you kinda like how it wants to hang open by itself even if it's still mostly concealing one half of her flat chest. Bree's right side has the most material still available. You could strip that out too, but a design is probably safest.
Pulling at the side of Bree's suit, you slice straight into it then wrap around the front of Bree's body at an upward angle. You cut a long diagonal slit up over her chest and stop just to the outside of her only covered nipple. You then reset, moving to the middle of her side, starting a second slit below the first, slicing up in the same fashion but this time finding the opposite side of that barely concealed nipple. You do this again and again, cutting lines across the front of Bree's suit, never overlapping and always stopping short of the edge to make sure the suit can still hold together. You end with one last long slit, stopping just before the hem over her left leg.
It's obvious Bree wants to cover up what you've exposed. She's doing her best to bravely take her dare, but it's hard to let someone expose you so brazenly. It's even impressive that she's still standing here. Her left hand hangs loosely in front of her crotch while her right holds onto her bare shoulder, trying to incidentally cover her most exposed parts.
"That's probably sexy enough," you declare.
Bree sways anxiously. "Good! Cuz this feels really weird."
"Why is it weird?"
"Cuz I look so stupid! And naked..."
"You don't look stupid." But she is very close to naked. "You look amazing."
"What? No I don't," your sis replies, swaying a bit harder.
"Sure you do. Gorgeous even."
"But... my suit is..."
"Showing off how good you look," you finish for her. "I bet you make the other girls in your class jealous." You're laying it on a little thick, but you'd love to keep your sister in this chopped up suit as long as you can, and complimenting her is as good an idea as any.
"Quit it," giggles Bree. "I do not! I don't even have boobs or anything." She fully palms her exposed nipple after that, becoming more self-conscious.
"So? Not all guys want girls with boobs. Some guys like butts, some legs, some will just want to kiss you all over." You're not even sure if your sis is thinking about boys, but she at least has some idea of what she thinks girls should look like. Best to play with that. "People like all sorts of different parts and features. Sis, just because you don't have boobs yet doesn't make you less attractive. I bet lots of people think you're a teenager." No, they sure wouldn't. "Hell, even I think you're crazy cute."
"You do? You... think I'm pretty?" She says it with such an incredulous tone, like she never thought she would ever hear you say something like that. You probably wouldn't have if not for what the past two days has awakened in you.
"Yeah, I do. You're very pretty. Beautiful even. You may be my sister but I'm still a guy. Guys notice these things. I've seen you dance around the house plenty of times, and you can be very sexy when you want to be." You quickly add, "Especially now in that swimsuit."
Bree smiles and flutters her eyelashes, looking away in stereotypical nervous schoolgirl fashion. She's not sure how to process these comments from you. With a complete lack of experience in the "sex" department, your reddened sister expresses a confused mix of naughtiness and embarrassment.
She really is very cute though. You're not just saying that. Both her slim form and her perky personality are more than alluring. And with her more recent exhibitionist behavior you can only imagine what she'll be like in the bedroom in a few years. Right now she is old enough to have enough shame (and sense) to want to keep her bits to herself (despite the fun she has doing the opposite) but innocent enough to not be too concerned by what this all might mean. She's just having fun. At the very least your little confidence boost is helping her ignore how weird it is to be (un)dressed like this.
Blushing full-bore, Bree pulls her hand up to tuck under her neck, fully baring her torn open crotch again.
"Thanks. I do feel funny though..."