She Begs To Keep It Simple

Jen pressed her lips together before rolling them in, you tilted your head trying to decipher if she was battling with telling you to do something dirty or panicking that you may do it yourself. Finally, her deep emerald eyes snapped up and locked with yours, "J-John...please, I can't do that other stuff, I really need this to be as easy as possible. I don't want this to start becoming sexual,"

"And neither do I," You calmly replied, feeling a bit disheartened but fully understanding at the end, "You just wait here, and I'll go get you another dose, after that, you should be alright for the day," You said with a reassuring smile. Jen returned it and watched as you got from your seat, stepping past her as you made your way back to the bathroom, "You are only a stage one patient, correct?" You ask with a quick glance back to her,

"Stage one? There are stages?" Jen gulped with a set of wide eyes,

You frowned slightly, immediately annoyed that the doctor who diagnosed your sister clearly didn't go through everything with her as he or she should have, "When you were with the doctor who diagnosed you, what did he say about your disease?"

"H-He said it was...minor, I think?" Jen replied in a shaky voice,

"Oh, okay, okay, that's good," You nodded causing Jen to let out a long sigh of relief, "You're a stage one patient then, that means you're really only going to have to do this once or twice a day. Well, as long as you're getting the healthy full loads that you're body requires," You explained, "Sometimes the disease can advance, and that would mean your body will start to require even more of this."

"How much more?" Jen asked with a set of wide eyes,

"The worst case we've seen?" You replied with a small hum while thinking, "I believe the woman had to ingest nearly ten loads to be sustained, close to two glasses actually," Jen silently stared back at you, unable to do anything but fear that she'd eventually end up like that, **** to go up to men all day and beg for them to cum in her. Her lower lip trembled for a moment, and she blinked her wet eyes a few times, "But, that was an extremely rare case!" You almost exclaimed, "Advancement doesn't happen often and if it does, it'll only up the dosage by one or two, meaning I could still provide for you in that case."

Jen's head slowly hung down, and she simply stared at her legs, "Can you just...I'd just like to get my dose now, John," She softly murmured out,

"Right...I'll get that right away," You softly agreed before turning around and making your way back to the bathroom. You pushed back into the room and softly shut the door behind you, unzipping your pants and fishing out your cock. You let out a small sigh and pulled out your phone, knowing that this time you'd need to watch something to get you to your edge. You pulled up a porn site and scrolled around, checking out different videos before finally picking a video with a petite platinum blonde girl in it. She didn't look too much like Jen, but the video was **** based, and she was getting a load in the mouth, so that was more than enough.

You set your phone down on the counter and reached over, grabbing the top of the thermos cup, before starting to pump away at your stiff length. As you worked away at yourself, you began to think about your little sister a bit more, feeling a bit ashamed of how eager you were to be her donor earlier. Jen was taking her disease hard, and even if you were playing up being a fully selfless brother, you knew that you were at some level happy with the situation. Finally having the object of your lust swallowing your load was something you'd always dreamed of, but the reality of the situation wasn't nearly as good as the fantasy. Especially since Jen was basically **** to comply under the threat of ****.

You shook your head and decided that you needed to get a grip, grow up and be the brother Jen needed. You refocused on the video and picked up the speed of your pumps, letting out small grunts as you tried to finish off as quick as you could. "Come on...come on, almost...oh fuck, Jen," You whispered under your breath as your mind picked your sister gulping down your spunk from earlier. The look on her face was perfect; it was like nothing in the world mattered beyond sucking down your cum. With a small shiver you felt your balls tighten and with Jen's face still prominent in your mind's eye, you felt a surge of your seed shot from your cock into the cup.

You couldn't help it, no matter how much you may want to change your mind, you wanted your little sister swallowing your loads and this was just too good. Each shot felt like pure bliss as your mind kept picturing your sister with puffed out cheeks and glazed lips of cum, swallowing everything down without hesitation. With a final squeeze of your cock and a long exhale, you finished your second load, this one just as strong as the first. You set the cup down and shut off the porn before putting your pants back on. You lowered your head and let out a small bitter laugh, "Fuck...I need to get with this, this isn't a fucking joke for her," You chastised yourself before opening the bathroom door, returning to the living room, where you could just hear your sister whispering out to herself.

"It's okay...it's okay, girl," She sniffled, "John's going to make it all okay, he's going to keep you safe and protect you. He's your big brother...he always knows what to do," Jen said with a small hopeful smile, "J-Just try and think that this is a...fun thing," You halted completely, "I did have that crush on him when I was younger..." She said with a breathy laugh. You felt your cock already starting to reawaken as you heard Jen's words, never once did you think your sister would have felt some sort of attraction to you as you felt for her, "John's going to make everything okay," She repeated before taking a long, confident breath, "John?! Are you almost done?!" She called out causing you to shake your head and enter the room,

"Just finished actually," You chuckled while handing the cup over to her,

Jen looked down at the container of your spunk, slowly swirling it around in her hand, "That's just as much as last time,"

"More is always better," You simply remarked,

"Right...of course," She reluctantly agreed, "Well...bottoms up," She shrugged before throwing her head back with the cup, downing your cum like a shot glass. You felt your cock swell as you watched her, finding her personal method of doing it quickly and fast a bit hot. As if she just couldn't wait to get it in her. You watched as she also did what she did last time, cleaning every last drop from the cup with her finger before licking her lips clean, "Okay..." She sighed, "There, I should be good for now, right?"

"More than likely," You nodded as you took the thermos top away from her, "I'll go clean this out,"

"Thanks, John," Jen replied with a sincere look, "I'm just going to rinse my mouth out,"

"Of course, Jen," You nodded back while heading into your kitchen, feeling a bit eager and for once relieved that you didn't need to feel so ashamed about it. Apparently, somewhere deep down in Jen, she was a bit happy that she was getting cum from you personally.