She agrees to do more

Although the thought of getting your sister to help with the growing problem currently in your lap, the head on your shoulders was telling you it was a bad idea. With it being early morning your Mom could walk by at any time and considering your door was still wide open from when Sarah barged in earlier, there was a risk of getting caught. That didn't mean to say you were against the idea, just that you wanted at least a little more confirmation before you just whipped it out.

“So I can do anything I want with your arms and hands” you questioned.

“Well duh, I just said that” Sarah mocked.

“And your legs?”

“Well yeah, I thought that was self-explanatory”

So from the looks of it, the passive explanation of ‘Will allow the User to touch/use any of their limbs’ was 100% true. With that tested, you finally decided to ask the most important question. You lifted the covers so she could see the strained outline of your dick against your boxers.

“So if I asked you to jerk me off right now, you would...” you asked slowly getting quieter as you lost confidence in yourself. Sarah eventually let out a huge sigh as if she was expecting this from you.

“Ah so that's why you were asking all those questions” she replied with a bored look filling her face “Can this wait until later, I’m really tired” Sarah pouted as she looked at you.

Hmm, interesting. You were almost worried from her expression before but that was for completely different reasons. So it's not like she's against the idea of giving her own brother a handjob, just that it's mildly inconvenient at the moment for her to do so. Knowing you weren't about to get the crap beaten out of you really improved your mood.

“Hmm, I'm not sure, you did just say I could do anything with your hands. I don't think you get to pick and choose when that applies” you smugly answered back.

“Uhh fine” she whined, pouting even more than before. ”So are you gonna get it out or what, I haven't got all day.”

You had expected a lot more back and forth before she gave in so you were pleasantly surprised by her lack of hesitation. You quickly glanced at the still open door and decided to risk the impromptu handjob. You got up and lifted your legs to the side of the bed so that you were now fully facing your sister. You scooted forward so that you could remove your boxers and pushed them out from under you until they reached the floor. A quick flick of a leg sent the underwear across the floor, leaving you completely naked.

You looked up to see Sarah, wide-eyed staring at your crotch. It took her a few seconds to avert her gaze as she realised you were watching her.

“I just wasn’t expecting you to be... You know as big” she blushed before quickly trying to explain herself. “I was expecting it to look a lot smaller considering it's attached to a dork like you.” she teased before getting down on her knees.

“I’m gonna take that as a compliment but you're gonna need to do a lot more than look if you want to get me off anytime soon” you fired back.

She shot you a quick glare before reaching out and wrapping her hand around the base of your shaft and gave it a few casual strokes. You weren't expecting much but as soon as she started you felt a tingle go up your spine and an involuntary groan escaped your lips.

You leaned back on your arms and closed your eyes, wanting to enjoy the moment but once you got over the initial wave of pleasure, your eyes opened back up to see the sight of your sister kneeling between your legs. It was a sight that almost made you cum then and there but you held back hoping to prolong your enjoyment. Once you got used to the pace she was taking, you found yourself coming back from the brink of climax. Sarah carried on for a minute or two using the same one-handed motion she had been using since the start.

“Am I doing a good job? This is the first time I’ve ever done this before... To someone as big as you I mean!” she quickly added, seemingly embarrassed by her lack of experience. You made note of her slip-up and decided to call her out on it,

“You're doing okay given that it's your first handjob. For starters, It’d be better if you used both your hands or just used one to focus on the tip where it's more sensitive” you suggested.

“I just said it's not my first,” She complained but still took your advice to heart by adding her free hand to the mix and used that to focus more on the head of your dick. She quickly settled into a new rhythm and you felt like your life couldn't get any better than this but with her newfound technique, you were getting closer and closer to cumming.

You wanted to prolong this feeling but Sarah seemed determined to get you to blow your load.

“Just a head’s up, I’m getting pretty close” you said through gritted teeth. “ If you want me to make less of a mess you're gonna have to slow down”.

Sarah looked around in a bit of a panic, trying to see if there was anything she could use instead of just her hands. She eyed the tissues on your desk before deciding they were too far away. She carried on searching before she found what she was looking for.

“I know, cum in these” Sarah suggested, reaching out a hand to grab the panties she took off earlier while making sure she still kept stroking you in the meantime. She sped up her stroking and the look in her eyes made it seem like she was excited to watch your climax. Briefly, you thought you saw her lick her lips but you were too far gone to know for sure.

“I’m cumming!” you announced, trying to warn your sister. Sarah didn't seem ready, as the first jet of cum shot out and covered her hand. She quickly covered the tip with her underwear and managed to contain the remaining load, completely soiling her underwear.

It took you a few seconds to slowly come back down from the pleasure that you had experienced before you were then able to think clearly again. Sarah was still sitting there on her knees but she was now more relaxed with her thighs now resting on her calves. You watched as she idly sat there playing with a string of your cum that had landed on her hand, staring as it stuck and stretched between her fingers. Noticing your eyes on her, she quickly wiped the rest off on her pajama shirt as a blush rose on her cheeks.

“What are you staring at, pervert?” she shot at you, trying to hide her embarrassment from getting caught.

“Says the girl playing with her Brother’s cum, and oh yeah, don’t forget. You're probably gonna owe me later when I convince Mom to let us have phones, so I’ll be using you when the time comes.” you ordered, feeling slightly excited about using the word ‘use’ when it came to your sister. Although you weren't in the mood for more at the moment, setting up more time to ‘use’ your sister wouldn't be a bad idea.

“Ughh fine whatever. At least you're giving me a warning this time. Just don't bother me in front of Mom or Lucy when she's back, that's still weird.” Sarah conceded. If she still felt it was weird to do this in front of family, you were pretty sure she would be keeping quiet about all this. With her agreement on the subject, Sarah finally got up from her kneeling position and started walking out of the room.

As she turned around you finally got to see her ass in full view and what a sight it was. Although you would usually call her ‘perky’, that bubble butt of hers blew that description out of the water. You considered getting her to stand there just so you could stare for longer but with your newfound trust in the KDK app, you knew you'd most definitely be getting your hands on those cheeks at some point.

With the KDK being at the front of your mind, you decided to give it a quick check just to go over Sarah’s stats. You didn't want a repeat of yesterday where you missed something new. Your home screen greeted you with a new notification, giving you a hint of satisfaction knowing you were right to check.

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