I'm an Aussie and use Australian spelling and potentially some colloquialisms. This is a work of fiction. Any resemblences to persons living or past are not intentional, enjoy.
My older brother Declan discovered it first, I in turn then discovered him. I guess you could say it was our parents' fault for not being more discreet, or for not hiding their stash better.
Declan was supposed to be the man of the house while our folks were away, not that we needed one, as we were both over 18, our parents were just old-fashioned. Anyway, there we were, older brother Declan (22) and four years younger little sister Mae (18), aka, me. As we hadn't played it for years, and as the whiny little sister I was, I'd insisted we play hide and seek. Declan eventually agreed, but after an eternity of waiting at the top of our parents' wardrobe behind their big suitcases, I decided Declan had given up or gotten bored and that I should go find him instead.
I looked everywhere inside and outside our small run-down house, I was halfway to the neighbours when I realised like an idiot I'd completely blanked on the shed. Nearing the heavy side-door I could see the lock was off and the door was slightly ajar, not enough for anyone but a tiny undersized little me to squeeze through without having to open it wider. In that moment I was so angry with Dec that he'd decided to hide from me instead of playing the game properly that I was really to cry and shove him in anger when I found him. Resolving to use all the worst cusses I'd heard recently, I snuck though the door and into the darker recesses of the shed where I heard a rasping and turning of pages.
Something gave me pause and I crept closer toward the sounds, realising big brother Declan seemed to be muttering something, I could feel tension in the air and an odd smell, musky and alluring. I recognised I was catching my big brother in a personal act, finding out from him later he'd stumbled across dad's overwhelming collection of porn magazines, erotica and toys. Hidden behind the rags, car manuals and loose parts in the bottom shelves of the cabinet. Our father (the horn dog!) had a collection of everything: old, young, straight, bi, gay, golden shower, lingerie, non-consent, cross-dressing, bdsm, taboo... you name it, our father had porn about it, and it wasn't only in pictures, although that all came later. For now, it was the pictures that had captured my big brother's attention, and I realised now just how BIG as I saw him furiously pumping himself to the nuible young brunette spreading her second set of lips for the camera.
"You're such a bad girl Mae!" Dec moaned as he grasped his cock hard.
I freaked, naturally, had I been made or was he picturing me as his target?
Suddenly my fingers were spreading my own nether lips, involuntarily finding the flood that had started of its own volition, void of my knowledge when I first smelt the perfume of my brother's lust. I orgasmed almost immediately, wondering what Declan would do if I made my presence known.
While my senses continued to feast on Declan's private moments, my brain hatched a plan to make me a formal part of them. I had to have him! Orgasming again and again as my fingers ground into my clit, I decided to wait and watch the rest of the show first. Declan was nearly there, huffing and puffing, he began clenching his butt cheeks "Mae, oh little sister!", it seems I wasn't the only one contemplating acting on these taboo desires as he now obviously stroked himself picturing me.
"Little slut, you want my big load huh?! You want it all over your face and tiny tits?" still absent-mindedly playing with myself, I came again, this one the big one! Somewhere in my orgasm, I lost consciousness.