Cumming With My Sister

Growing up, the house my sister and I grew up in would be considered a fairly open house. That's not to say we were nudists, because we weren't. It's not like we just walked around naked all day for the fun of it. But at the same time, nudity wasn't something we shied away from. Especially with the two of us sharing a bathroom, it's something that just happened. Getting ready for school with us needing showers, her fixing her hair while I brushed my teeth or other things of the like, I'd say we probably saw each other naked at least two or three mornings out of the five. It's just what it was. It probably didn't help (hurt?) that our parents encouraged us to sleep in the nude from a pretty early age. Not just to help out with less laundry per week, but that we would sleep better and cooler, which definitely came into play during the summer. Also, while we didn't talk much about sex at all, we were taught not to be ashamed of sexuality. 

Ok, I'll explain that one. When I learned to masturbate, I did it on my own. For the first couple years or so, it was a very hidden thing. One day, however, I got sloppy. I was playing with myself in my room after school and I didn't hear my dad come home from work early. I was naked in my bed going to town, and suddenly I heard "Whoops, sorry." I quickly looked up and he was standing in my doorway. I curled up and tried to cover everything and he said, "No, no, go ahead, you're fine. Just come find me when you're done." He then turned and walked away, back down the steps. A little stunned, I couldn't believe my boner felt even harder than it did before. I took a few more minutes and shot my load before getting dressed and finding him. And by dressed I mean just my underwear and a pair of basketball shorts. When the weather turned warm I was pretty much always bare chested and barefoot.

When I was downstairs he let me know there was nothing wrong with what I was doing. Just to try and keep a little privacy when I did it. From that point on, I did. Bathroom, taking a shower, late at night, etc. With that, I'm pretty sure my sister was taught the same things, as there were some times late at night I could hear her sheets rustling around for a few minutes before going silent. 

Flash forward, and we're at my sister's 16th birthday party (she's a little over a year older than me. My parents wanted to have us early.). It was about 70% family 30% her friends, and her friends were kind of giving her some gag gifts for her Sweet 16. When her best friend handed her a bag, though, sit giggled, blushed and held her face in her hands. People asked what it was, and she pulled out a sparkly purple vibrator, which made the room erupt in laughter. When my sister gathered herself she asked where her friend got this, and said she had her older sister buy it. I then heard my mother say, only about half-jokingly, "I'll make sure you have a box of batteries." My sister then nuzzled the package against her face and said, "Were going to get to know each other later", which caused more laughter in the room. 

A couple of nights later, I guess from all the soda I had drank during the day, I was having trouble falling asleep. The clock said 12:25, but luckily we were on summer vacation at that point. I was laying there staring at the ceiling when I started hearing some heavy breathing from down the hall. I got out of bed and quietly walked down to her room, and when I got to her doorway I also heard buzzing. I peeked into her room (we all slept with our doors open) and saw her on her back, legs spread apart and holding that vibrator against her vagina. My eyes bugged and jaw dropped as this was the first time I had seen her, or any real girl, in fact, masturbating. My cock instantly sprung out as I watched her squirm around in her bed, squeezing her breasts, her feet flexing and toes spreading apart. As I kind of said before, I knew she masturbated, but seeing her in the middle of a session was truly something else. I silently hurried back to my room, my little penis bobbing with every step. As soon as I slipped back into bed I started stroking, cumming in about 10 seconds. Needless to say, it helped me fall asleep. Cumming again that morning, I acted like I had no clue she had masturbated the night before all throughout the day. That night I purposely stayed awake late but didn't hear anything. The night after that, however, I heard those now familiar noises. Much like the first time, I watched for a bit, snuck back to my room and had a fantastic orgasm. The third night, however, I went a step further. This time she was laying on her belly and grinding against her new favorite toy. Since she couldn't see me if she had to, looking around the corner I started stroking. Watching her getting closer and closer to her own orgasm, my fist pumped back and forth along my shaft. After a couple minutes she started shaking and moaned softly into her pillow, bending her legs, her feet waking back and forth in the air, her toes curled down tightly. I cupped my hand in front of my pee slit and started shooting what felt like an endless spray of hot cum as I watched her wriggle around in bed, enjoying her post-orgasm bliss. Tiptoeing back to my room, I could only hope and pray I didn't drip anything on the carpet. 

Waking up the next morning, however, all I could feel was guilt. Spying on her during a private moment suddenly weighed heavy on me, especially since I masturbated watching her do it. Our parents long-having left for work I walked down to her room, just going bare. She was still asleep, so I sat down on the edge of her bed and after a couple minutes I softly shook her awake. It took her a few seconds to get used to the light in the room, but seeing me sitting there still naked she asked what was wrong. I admitted that I heard her and peeked in on her, which shocked her a little.

"You saw me masturbate?"

"Yeah." "When did you see me?"

"Three times this week...the third time I saw it all."

"All?"

"I saw you...finish...and there's more." Slipping off the sheet and sitting up, legs crossed she asked what else. "Seeing you...I did it too."

"You mean, you did it thinking about me?" I shook my head.

"No...while watching."

"So...while watching me masturbate...you masturbated too?"

"...Yeah."

"And you came?" I just nodded yes.

"Oh...ok..." She could tell I was getting upset telling her about it.

"I'm sorry, I never should have spied on you. I feel really bad about imaging your privacy like that." I was on the verge of tears at that point. She scooted over to the edge of the bed and sat next to me, telling me it's ok. "Don't worry, I'm not mad at you. I know you're curious about things. I'm just glad you were honest with me about it."

"You are?"

"Yeah, it's not like it's a big secret that we do it or anything. I know you do it too." I kind of smiled and she put her arm around me, telling me she loved me and not to feel guilty about it. Her reassurance made me feel more relaxed, and actually...a little excited. I don't know if it was from us sitting there together naked or talking about masturbation, but I was starting to get an erection. Not only that, but she noticed it. She looked at it and said, "Well, it looks like someone is ready to go again." I put my hands over it and said, "Sorry, I can't really control it." She pulled my hands away and said, "Don't be ashamed, we both do it. Remember?" I sat there and spread my legs a little, my 4.5 inches poking straight up. "You know, if you want to make it even...go ahead." "What? Here? In front of you?"

"Sure. I mean, you watched me didn't you? Fair is fair." 

I figured she was right, so I leaned back, showing my full erection. I took my cock in my hand and slowly stroked it while she sat back against her pillows. Leaning on my other elbow I started picking up my pace, closing my eyes, enjoying the feeling between my legs. Maybe 5 minutes went by and I started getting that familiar feeling, making me stroke harder with my mouth half open. My legs were sticking out and my head fell back, getting closer and closer to my cum. My breathing got heavier and I tensed up, letting out a sharp grunt as stringy ropes of semen shot all over my belly. I relaxed into her bed as I caught my breath, she reached over and grabbed her box of tissues, setting it next to me. I started cleaning myself up and she asked me if I felt better, and I said, "Not exactly...I think I can go again."

"Already? Ok, go for it." I scooted up to the edge of her bed, planting my feet on the carpet and started stroking again. This time, however, I wasn't alone. She rolled over and got into her night stand, pulling out her vibrator. She sat next to me on the bed and started buzzing her toy against her pussy lips. Knowing there was a girl masturbating with me, even my sister, I was incredibly turned on and knew I was going to have my second cum fast. I stood up and stroked like there was no tomorrow, holding another tissue in my other hand. My knees almost buckled and I held up the tissue, unloading my second blast of cum in about 10 minutes. Plopping back down into the bed, she was still going, eyes closed and biting her lip. It wasn't too much longer before she was softly humming, pinching her hard nipples and slowly rocking her hips. Suddenly she closed her legs tight, saying, "Oh, oh...oooooh...." as waves of orgasm flowed over her. She rolled over onto her back with her legs still closed, knees pulled up to her chest, moaning how good that felt. Feeling better about the whole thing, I got up and went back to my room. I sat down on my bed and replayed the whole thing, and after a few seconds she walked up to my door. Still naked, she asked me if I wanted to go catch a movie or something. I didn't have any money, but she said she had plenty from her birthday. "Come on, throw on some clothes and let's go." She didn't have her license yet but it was only about a half hour walk, so we both put on our summer best (old t-shirts, shorts and sandals) and trekked to the mall. 

On our way they're we talked about it, both knowing that this was just a one time thing and isn't going to happen again. We agreed to keep each other's privacy, and for the rest of the day we just spent our time as a close brother and sister, albeit ones that just watched each other masturbate.