I started using my older sisters silky panties to masterbate in.  One day I was curious about the semen I shot into her panties and decided I was going to taste it.  At first I was not something that interested me but I kept tasting and eventually I enjoyed licking up any and all of the cum that I shot into her panties.  

 

I am not sure how I actually took the next step but I began taking my cum and putting it on both sisters toothbrushes, hairbrushes and any of the snacks they kept in their room. 

 

Somehow the thought of my cum on my sisters undergarments and them putting it in their mouth or in their hair excited me.  And I did enjoy the feeling of warm cum on my belly after I masturbated. 

 

In the summer months when there was no school my little sister and I would set up a tent in our back yard and camp out.  I remember very well the one night that I decided to pretend to be sleeping and waited for her to fall asleep.  She aways had on tight shorts and a tank top for bed.  When I knew she was asleep I pulled out my cock and began to stroke it while I looked at her little ass until I shot my load on her.  In the morning when we made our way into the house I could not help but notice the dried cum spots on her shorts.  As time passed I got a bit bolder and would shoot it in her hair or on her chest if she was sleeping on her back. 

 

 

One day that same summer I could not get any privacy in the house to masterbate so I grabbed one of the magazines and snuck it out to the tent and started to masturbate.  I never heard my little sis coming and there she was kneeling at the door of the tent watching me stroke my cock. My sis was was facinated with seeing me shoot. 

 

We slowly progressed from her watching to helping with her hands.  She was a reader and was always reading the hustler stories and telling me about them.  She told me about how the female took a cock in her mouth and she wanted to try.  And so we went from her watching me masturbate to her sucking my cock and eventually swallowing all my cum. 

 

Short of fucking, if she read about it we tried it.  I was sucking on her flat chested tits, rubbing my cock on the nipples, pinching and pulling on her nips.  I would rub the tip of my cock on her smooth pussy and shoot cum on it and then she would rub on her clit with it and even finger herself. 

 

It was an amazing summer