I never knew my Half Sister, Linda, but she moved in with us when I was about 18 and was at that stage of being very curious about sex. I was always sneaking porn mags of my Dads and jacking off to them.
One evening when my folks were out for the night I was in my room, checking out the mags and stroking my cock, not knowing that Linda was watching thru the crack in the door to my room. I was really getting into stroking my cock and fantasizing about the pictures. I had closed my eyes stroking my growing cock when I felt something warm on my cock. When I looked there was Linda taking my cock into her mouth. she looked at me and smiled she said " Let me show you the real thing " I was too horny to say no. She slid her mouth down all the way on my cock, I felt such a sensation, I knew I was about to cum. I said " Fuck, Linda I'm gonnnnnnaaa ccccuuuummm. " She stopped and squeezed the base of my cock until the urge passed. When she released it a little bit of cum oozed out which she licked off with the tip of her tongue, then she kissed me shoving her tongue deep into my mouth. As I tasted my own cum my cock seemed to grow even harder, I sucked hard on her tongue, enjoying every drop of my own cum.