The summer before I started college, my sister, Jerri, was home for summer break...being two years ahead of me in age and academics.
It was early afternoon, and I'd just returned from the gym. Both of our parents were at work.
Coming through the door with my gym bag in hand, I noticed one of Jerri's shirts crumpled up on the couch. Her shoes were strewn haphazardly on the floor in front of it.
Jeez, I thought heading to my room...Jerri's such a slob.
Interestingly, as I made my way towards the hall, I saw a pair of her jeans hanging from one arm of dad's recliner, along with a booty sock throw on top of it.
Had the girl undressed herself all over the house? I wondered...
The pair of panties on the floor in the hall confirmed it.
Really? I thought.
"JERRI!" I called down the hall, "mom's gonna be pissed!"
I got no reply. Thinking she must be out, I shook my head...it wasn't my problem.
In my bedroom, I dropped my bag and stripped off for the shower.
Wrapping a towel around my waist I headed towards my parents room. I prefer their walk-in to the tub shower in the hall bathroom. They allow us to use it as long as we keep it clean.
Rounding the corner into my parents' room, I reached the open door and stopped dead in my tracks...
My sister, Jerri, stood in the walk-in shower, totally nude, with the water off, leaning against one wall with her eyes closed.
Her hand was between her legs, sliding three fingers in and out of her naked, shaved pussy. Her other hand lifted and rolled one of her huge tits. Lifting it to her mouth, she sucked her own nipple between her lips and bit down on it, moaning loudly.
I was stunned.
I'd only seen my sister naked once before, when we were much younger.
But I'd never seen her masturbate.
My sister was hot as hell.
Of course I'd noticed the way her enormous breasts swayed under her shirt or in a bikini when she walked, and I was privy to watching them grow through the years...but she was my sister for fuck's sake...and I always tried hard not to think about her like that.
Now, here she was, totally naked, finger-fucking herself and sucking on her own huge tit, right in front of me.
She hadn't noticed me, and I scooted quickly to the side, hiding behind the door frame where I still had a perfect view of her.
My cock rose hard and fast beneath the towel, making a tent at the front.
I should leave, I thought. Watching my nude sister masturbate was so wrong...not to mention getting hard over it. But for some reason, I stood there watching her.
Jerri had always been very pretty. But now, watching her naked, I really realized just how incredibly sexy and gorgeous she was.
Her huge, naked tits heaved and lolled, hanging in front of her as she lifted one leg and braced herself in the corner with it. Her pink aureole was swollen with excitement. Still holding one large, round, naked tit in her hand, she sucked her thick nipple hard, circling her tongue around it and nipping at it with her teeth.
Then, releasing her tit, she opened her legs wider with one foot still against the corner and spread her swollen pussy lips with her fingers. With her other hand, she jammed at herself hard and fast.
"Oh...yeah...fuck...eat me...suck my pussy" she moaned loudly, closing her eyes.
