You weren't exactly the pride of the family.

Still living at home at twenty-five, though you protested that was way more normal nowadays. Lazy, sloppy, good-natured but poorly-motivated. After dropping out of college, you had fumbled your way through a string of part-time jobs before settling on Twitch streaming. You weren't successful enough to move out, not by a long shot, but you made enough to pay the rent that our parents asked of you.

Barely.

Although frankly, I'm not sure you could survive on your own regardless.

“Yo! Anybody awake in here?” I call out, knocking lightly on the door as I push it open. It's the middle of the afternoon, but your room is dark save for the pale blue light of an abandoned computer monitor, buried in a forest of cables, buttons and plastic trash. The air in the room is stale and a little sweet, probably indicating that one of the empty energy drink cans has spilled on the carpet somewhere. “Hello-oh, for goodness’ sake.”

I smile indulgently when I see you, sprawled out across your unmade bed in nothing but a tank top and panties, both stretched to bursting by your naturally curvy, slightly chubby body. Your legs are spread in the most unladylike manner, with only the barest strip of fabric wedged in between to cover your modesty. I take a deep breath, forcing myself to stay calm even though your ample chest is rising and falling beneath the straining fabric of your blue tank top.

Steeling myself and trying to focus on something other than the rapid, unbidden swelling in my pants, I flick the lights on. “Wakey wakey, sleepyhead!”

A long, luxurious groan can be heard as your eyes crack reluctantly open, squinting painfully up at the bulb on the ceiling. “Noooooooo…” you whine, wriggling around on the bed in a far too tempting manner for someone who shares my damn DNA. “Whyyy?” you complain.

I offer a neutral smile, tipping an imaginary hat. “This is your scheduled 4pm wake-up call, ma'am.”

“Ugh.” You scowl, scrunching up your nose cutely and dragging yourself into a sitting position.

I try not to take notice of how your thighs squish together as you sit up. “Are you going to clean before you stream?” I hint, glancing at the mess of Dorito packets and Monster cans.

Your bottom lip sticks out petulantly as you glance up at me through thick lashes and tousled bedhead. “Noooo, I don't have time … will you do it for me?”

I sigh lightly. No time, my ass. Still, I can't seem to say no to you. Despite being five years younger, I've always seen you as someone to take care of. “Later,” I promise. “I have to go shower before work. But I've done your laundry, so find something clean in the hamper - you'll get banned again if you stream like that.”

Your face splits into a bashful grin, though you seem more grateful than embarrassed. You certainly make no moves to hide your bare thighs or squishy midriff. “Thank yoooouuu,” you yawn, losing the battle against instinct. “I'm hungry, too. Did you, by chance…?”

I pause. I'm tempted to say no - Mom always tells me to stop spoiling you. But those upturned eyes, that accidental cleavage on display… “...Yeah. There's chicken salad in the fridge. Eat it quick, or you'll be late for the stream.”

“S'fine,” you grumbled, swinging your legs to the floor at last and standing unsteadily. “Thank you, Alex.” You loop your arms around me in a half-stumble, half-hug; due to the height difference, it presses your chest directly into my face.

“Welcome,” I mumble, extracting myself with some difficulty. “I really gotta go shower now…”

It's not a lie; I do have work at the same time your stream is due to start. But much more pressing as I hurry away down the hallway is the inconvenient tent rising in my pants.

Nudging the bathroom door shut behind me, I quickly strip off, realising that my cock is now at full mast as my imagination runs away with it. Disproportionately large even for a bigger man, it looks positively gargantuan on my short, slender body. Nearly ten inches long, it juts out and up, swelling so thick that I swear I can feel it drawing blood from my head.

I can't go to work like this.

Hurriedly, I run the shower hot, stepping in and pumping my hand along the hot, rigid surface of my veiny shaft. Since I'm under a time crunch, I allow my most taboo fantasies to take over. You. It's always you. Bent over on all fours, your bouncy ass in the air. Or lying back on your bed just now, but peeling your panties to the side so I can plunge my cock deep inside your sticky, tight slit. Unloading pump after pump of thick, potent cum directly into your womb, then pulling out and splattering more across your stomach, and-

Before I know it, I'm erupting for real, muffling a groan as I blast rope after thick, gooey rope against the shower wall. It's shameful, but nothing in the world makes me cum quite so hard as the thought of absolutely railing my sweet, curvy, slovenly, adorable older sister.

It takes maybe thirty seconds for my orgasm to subside, and another minute or two to calm down my breathing and regain full consciousness as my shaft deflates to a more manageable size, though it still hangs heavy and thick. After rinsing off, quickly soaping myself down and turning off the shower, I step out to see that the bathroom door is ajar. In my haste, I mustn't have closed it properly.

I sure hope no-one saw.

Okay. Well, obviously, you saw. Maybe you half-consciously stumbled to the bathroom, forgetting I was using it. Perhaps you just passed by on the way to the fridge. Whatever the case, your attention was grabbed by the absolute monster of a cock your little brother was packing. Not only that, you watched him cum like a firehose.

Now, perhaps you don't make the connection between what I'm doing and what you subjected me to right away. I don't really see this playing out as one of those typical ‘sister catches bro jerking off, takes advantage’ type prompts. Your character would ideally be a little shy, perhaps relatively inexperienced, awkward, dorky, adorable, bit of a hot squishy mess all round. I'm curious to see how you'd progress once you're unable to get your brother's dick out of your mind.

Basically, this isn't really either femdom nor maledom. Just the extension of our dynamic into sexual terms. So not only am I spoiling and coddling you by doing chores and things, sticking up for you, generally acting like the older sibling… I also end up spoiling the hell out of you in bed.

How we get there is up for discussion though!

I have a DPP profile now! Feel free to peruse and check out my kinks etc. Tl;dr is sweetness and affection good, meanness and butt stuff bad, references okay but not required, and 1-3 paragraphs per message despite the massive intro post above!

See you in my inbox! <3