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MASTURBATING WITH MY SISTER

Posted by: Age: 15 then Posted on: 9 comments
23 likes 34974 views Category: Masturbation Male-Female Tags: teenager, mother, sister, watched, watching
As I explained in my previous stories, I was frequently horny as a teenager and had an adoptive mother who told me to masturbate frequently to relieve my sexual tensions. She was very sexually liberated and sought to help my sister and I better understand sex. This is about the first time I masturbated with somebody watching and the first time I watched somebody else masturbate.

  When I was a teenager, my adoptive mother and my sister helped make me so horny so often without intending to. Mom made sis and I exercise with her every day. She said it would help use excess energy, keep us fit, and make our bodies attractive.  It certainly kept our bodies slim. Mom looked slightly younger than she was. She and sis often wore tight clothes.   When the weather was warm, they wore miniskirts or short shorts, and crop tops, leaving their bellies exposed.   Constantly seeing two slim women dressed like that kept me frequently and intensely horny. They kept catching me ogling them. Whenever I was shirtless, I caught Sis ogling me. A few days before I was 15, Mom sat Sis and I down to talk about this. I admitted that they sexually aroused me. I confessed that I sometimes thought about their bodies, and sometimes fantasized about having sex with them, when I masturbated.  I confessed that the knowledge that two women I was attracted to were masturbating in my home aroused me.   Mom and Sis were flattered.   Sis confessed that she too sometimes thought the same of me when she masturbated.   She was made horny by the knowledge that a developing young man was masturbating in her home. But Mom made a rule for us. We were not to have sex with one another. Regardless of that we weren't biologically related.   She said that if we had sex I could get her or Sis pregnant.   Sis and I were virgins and Mom explained that she thought a virgin's first sexual intercourse shouldn't be with a close relative.   Mom also said she wouldn't engage in illegal sex nor have us do the same, and I was too young and too  much younger than her to have sex with her legally. I would have to satisfy my lust for one another thru private, individual masturbation.   Sis would have to do the same to satisfy her lust for me. A day before my 15th birthday, Mom and Sis sat me down to talk about this again.   Mom still wouldn't allow incest, but she and Sis had decided on a compromise.   Sis had a proposal. She hesitated to tell me what it was. She was nervous.  I knew the proposal or compromise must have been something sexual, because the topic was my attraction to Sis and hers to me.   I waited with anticipation and sexual arousal of what this proposal may be. Mom had to tell Sis to tell me what she wanted to do.   Sis hesitantly reminded me of what we had talked about a few days earlier. She said, "There's something I want to do with you, but only if you want to do it. If I do this for you, I'd like you to consider it a birthday gift." I asked, "What do you propose?" She said, "I want to see you nude while you see me nude. I want to watch you play with yourself while you watch me play with myself." I gasped.  I became incredibly horny at the proposal.   Mom said to me she had talked to Sis about this idea.   Mom said that Sis should learn how men want to be touched and how they lust for women, and that I should learn how women want to be touched and how they lust for men.  Mom said Sis and I could learn that by watching each other touch ourselves.   Sis asked, "Will you masturbate with me?" I was turned on by the very idea, but wasn't so sure about doing something so private in front of somebody. I hesitated until Mom told me to answer. I replied, "Yes, I'll masturbate with you." Mom noticed that Sis and I were nervous about doing that so she suggested we wait until night. The wait would give us time for that idea to sink in.   And it would allow me to have a very special birthday I would never forget! That talk made us so incredibly horny that when Mom excused us, we immediately went to separately, privately masturbate.   Each time I masturbated until our scheduled playtime together, I imagined Sis watching me touch myself and encouraging me to do what I was doing, or imagined that I was watching Sis touch herself while I egged her on. Then after dinner the night of my birthday, Sis and I began to prepare for our moment as if we were preparing for a day.   We brushed our teeth, scrubbed our faces, etc.   When we were finally ready, Mom told us she was going to touch herself privately, so as to give Sis and I time and privacy to share our masturbation.   The last thing Mom said to us before leaving was, "Have fun! And don't forget your lubes!"   Sis and I arranged two chairs for us to sit in, both facing one another.   We placed our lubricants beside the chairs. Then we stood in front of each other with anticipation.   Sis whispered, "I'm so excited! I've been anticipating this ever since last night. I've fantasized about masturbating with you every time I've masturbated since then." I replied that I felt the same and had done the same.   She asked me, "Are you ready?" I replied, "Yes, I'm ready!" Sis replied, "I'm ready too." I stood there and took off my shirt while Sis watched.   She whispered, "I love how slim and fit you look. Your nipples are pretty." She then took off her shirt. She wasn't wearing a bra.   First she showed me her narrow innie bellybutton, which I told her was cute.   Then a few seconds later revealed her whole belly, which  was flat and sexy. Then a few seconds later, she took her shirt off completely, revealing her developing breasts. Her nipples were shaped like the erasers on pencils.   I whispered that I loved her cute breasts and her beautiful erect nipples. I then took off my pants as she took off her skirt.  

   I then turned around and pulled off my underwear.   She said, "That exercise has given you a good ass." I turned around with my underwear covering and hanging on my erect penis, to make her anticipate seeing it.   I placed my hands on my underwear and waited a few seconds.  She stood staring and smiling with her mouth open. I then quickly pulled off my underwear, revealing to her my penis.   She covered her mouth with both hands and gasps. When she uncovered her mouth she quivered and whispered,   "I want your penis!" Then she turned around and took off her panties.   I whispered to her, "Your booty is so very fine!" She turned around, with one hand holding her panties over her crotch.   She waited for a few seconds while all I could see of her crotch was a little pubic hair above her panties.   She then quickly threw her panties to the side, revealing her swollen, glistening-wet pussy. I whispered, "Your pussy is so smooth!"   We stood there totally nude, staring at each others bodies for what was maybe a minute, but which seemed like forever.   We told each other that this was the first time we'd seen anybody nude except in a magazine or in a medical document.   We were so aroused we could hardly tolerate our horniness. I sat down one of the chairs, and Sis quickly followed. We sat so close that our knees touched. I whispered, "I'm going to show you what I do with my body when I'm alone."   Sis whispered that she would do the same. She began to feel her breasts while I watched and she stared at my naked body. I watched as she proceeded to stroke, pinch and flick her nipples while she watched me feel and rub mine. Then I watched her feel her belly and use a finger to rub the inside and outside of her bellybutton, while she watched me feel my chest and belly. After what may have been a two or three minutes of fondling, I whispered, "I can't take it anymore. I'm going to masturbate."   Sis replied, "Me too." At the same time we reached for our lubes, poured a little on hand, then put our containers back.   I then began to use both hands to rub and stroke my raging-hard penis while she watched the action and I watched her rub and stroke her pussy lips.   She then spread her legs wider and placed her fingers inside her pussy, rubbing and stroking the inside of it. After a short time I whispered, "I about to come." She whispered, "Me too." A few seconds after saying that, I bucked and came.   Without intending to, I shot my cum on her thighs and hands, the two chairs' seats, and on the floor in between the chairs.   A few seconds later, Sis clenched her teeth and lips shut and moaned in pleasure, while her lower body began thrusting back and forth as she came, letting her juices flow all over her hands and thighs and her chair. We lingered in the chairs for a few minutes.   We sat there looking at each other, smiling and breathing heavily while we savored the aftermath.   I told her that was the most intense and pleasurable moment of my life. She told me the same.   We told told each other that we had never before felt as relaxed and pleased. We then cleaned up the mess we had made and put our clothes back on.   Before going to sleep that night, Mom asked Sis and I if we went thru with our plans.   We told we did.   Mom asked if we enjoyed it.  We told her it was the most pleasure and excitement we'd ever experienced.  Mom asked for details, then we told her everything. Mom said that was very arousing.   Sis and I admitted we had gotten very horny from only telling the story.   So we all decided to go to bed and masturbate again. Sis's 16th birthday was a week later. She and I agreed to masturbate  together that night, while Mom went somewhere to masturbate privately and separately.  After dinner we repeated what we had done on my 15th birthday.   This time we lay towels on our chairs to make clean-up easier.   That time Sis insisted I cum on her again. I did as she requested. That wasn't the last of our sessions together.  Sis and I still enjoyed using fantasies and porn to masturbate alone. But until she was 18 and moved out Mom's home, Sis and I still sometimes stripped in front of each other and watched each other play with ourselves.   And sometimes we would look at a porno mag and masturbate together while looking at that.   In later years, we would sometimes watch porno videos together while masturbating side-by-side.

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