I had gone out with friends to a local bar. It happened to be having a wet T-shirt contest that night. It was one of those places that got you to hand over your keys if they felt you had too many. It was a good time so I had had a few, and at least one too many to drive. So here I am having taken an Uber home to realize without my keys I wasn't getting in the front door. I sat on the back patio for a bit and I think nodded off for a bit, maybe a half hour.
When I woke up I saw our dog Rusty staring at me through the patio door. Our patio door was double secure with a great latch and a reinforcing bar. So that was out as I had determined before my impromptu nap. I had sat down to think about other options. The basement window into the laundry was also latched well. Now less drunk and thinking better I remembered the tree. We have a huge Oak tree in the front corner of our yard. It had worked well when my sister and I had wanted to sneak out to meet our friends in High School.
So that was my answer, the only complication was the only window that was close enough was my sister's room. She had two windows onto the front lawn, where mine looked into the backyard but only one window. So I came back around to the front and saw my sister's car gone and I assumed she was out with her friends like I had been.
I had been out early with my buds with early classes at the nearby college I attended, as a Junior. I was taking liberal arts classes and considering being a teacher. With being early off classes this Friday, we started kinda early goofing off. My sister attended another university in the next town over. That's why she had a better car than me even though a year younger, at least that's what our folks said.
Unknown to me at the time our Mom had gone out with her sister, Aunt Carol, for drinks with the girls. Mom took my sister's car as she was home and Mom was feeling a sportier car would help her mood. Dad had gone on a last-minute trip for work to Iowa. So their car was in the driveway and my sister's was gone. I carefully made my way up that old oak tree and slowly out on the branch to the mostly decorative overhang at the front.
I made it to the short roof section, only about 2 feet wide but at a good angle against rain and snow. My sister typically left her window cracked for a little air in non-winter months. So when I got there I was lucky and found it cracked as usual. I quietly opened it a couple of inches, no need to make noise and scare Mom, but listened just in case. I heard some rustling but nothing worrying. It was probably Rusty again, he liked to sleep near my sister most nights.
I quietly opened the window further, just enough to slip inside and not fall to the floor with a thump. I reached back and closed the window back down to where it had been. That's when I realized what I had heard before was someone muttering. It turns out my sister was home and asleep. So not to scare the crap out of her I was trying to leave her room undetected. I waited there crouched in the dark until I could see better. My sister's voice got a little louder but not quite enough to hear what she said.
When my eyes adjusted, I could see small movements in my sister's covers. At first, I worried she was having a nightmare but it didn't seem like thrashing movements of fear. That's when I heard the only clear thing, my name but it wasn't like I was busted. I wait a minute more and nothing more. As I'm getting ready to slink out I hear, "Oh yes Nate, touch me like that." I heard her voice and realized it was filled with lust.
I thought about it quickly. Her last boyfriend wasn't Nate and I don't remember any others at our High School but it could for sure be some guy from college. As a Sophomore and very pretty my sister could have any guy she wanted. As a Dancer, she was lithe and willowy. She had started with ballet but had spread her interest in different styles after seeing the movie, 'Save the Last Dance'.
My sister Olivia, Liv for short, is a tall Raven-haired beauty standing 5'9" with small breasts that perfectly fit her trim frame. Her waist was tiny even eating the same way I do for doing a little running and roller-blading. Her butt and legs were taught and streamlined from all those years of dance. Not to say she didn't have a figure, just the opposite, she was the very image of beauty.
As I crouch there I decide it's time to get the hell out. It's then I hear her again, "Come on Big brother, put that hard cock into my pussy and have your way with me." It was right then that I realized my sister was dreaming about me, her brother Nathan, or Nate as I'm called. My next shock was now hearing a schlick schlick sound and realizing she wasn't asleep she was masturbating. With that in mind, it took me back a few years to a kiss we shared one winter during Christmas when she caught me under the Mistletoe. The kiss was hot and wet in its passion, if over quickly.
I had never really thought too much about my sister beyond seeing her beauty grow from a cute kid to a gorgeous young woman now. Now with her laying there moaning my name and stuffing her obviously wet pussy it didn't take much effort. Seeing those innocent touches and bumps over the last few years in a new light made me tingle and my balls in particular. Needless to say, I'm completely sober now.
Moments later she moans out, "Come on Nate stuff me full of your hard Big Brother cock and fill me up. Cum inside me and breed me like I want you to. OH NATE!" She cums hard, the result being her covers flying off and her naked sweat-sheened body arching in orgasm with her fingers stuffed into her hard. She relaxes again seconds after, her body flopping back to her bed. Her eyes are closed and she is breathing hard.
Knowing now how she feels, I slowly stand up and quietly step over and slip the sheet back over her. I say gently, "I never knew you had feelings and wanted me like that Liv." She gasps her eyes flying open to see me standing there. She wheezes out, "Nathan what are you doing in here?" I grin ruefully and say, "Sneaking in your bedroom window. I had too many at the bar and had to Uber home, without house keys as it turns out."
I sit gently down on the side of her bed and take her hand that was not in her pussy, now covering it unbeknownst to me. "Do you really want to be with me, Olivia? You could have any guy you want. Why me?" She inhales deeply and lets out an equally large sigh.
"Do you remember when we were in middle school and that bully was bothering me? You punched his lights out. He had two black eyes for more than a week. He never bothered me or anyone around me ever again. That day you became my hero and I haven't been able to shake that ever since. In High School and that Christmas kiss my feelings changed to ones of more love and want. I'm sorry to be such a messed up pervert, Nate, I'll stop and get help. Normally, I would talk to you if I had a problem but this wasn't one of them. You are the problem, when I see you I have these feelings that I know I shouldn't but ..."
As she spoke those words I recalled everything in sharp detail. Even having her throw her arms around my neck and kiss me after the bully, she thanked me over and over. I even remember her calling me her hero for months afterward. The mistletoe kiss memory had set my own feelings and heat rising, then it culminated when I saw her naked form calling out my name. My little sister was in Love with me and now I wasn't sure I didn't feel the same.