I had tried to keep myself in shape as much as possible. At 30, I was still slim with full DD breasts, a tiny waist, and long curly red hair. I kept my hair long since I knew your father liked it so much. I swam a few laps in the pool, and then climbed out and lay down on the lounge chair to relax. I hadn't laid there very long before I had that feeling of being watched. Sitting up, I noticed you standing there watching me. The look on your face was one of lust and a little bit of curiosity too. I could tell you were aroused by the bulge in the front of your shorts. Seeing you standing there like that looking at me caused the moisture to pool between my thighs. I held out my had to you, and you walked over to me slowly. I looked up into your eyes, and gently lowered the fly of your shorts and undid the button. You gasped in shock as my hand wrapped around your stiff hard cock and drew it out into the warm night air. I slowly licked up and down, using my hand to stroke you as well. My other hand tickled your balls as I gave you your first blow job. Soon, your hands were in my hair, forcing me to take you deeper into my throat as you moaned my name softly. I could tell you were getting close to cumming, so I slowly withdrew you from my mouth, and lay back down on the lounge chair. You were on me in an instant, your mouth on mine and your hands full of my breasts, squeezing them gently. You pinched my nipples lightly and I moaned at the sensation, becoming even wetter. Slowly I reached down between our bodies, and guided your cock to the entrance of my dripping pussy. With one thrust of your hips, you buried yourself deep inside of me. We both moaned at the sensation, and slowly I began to move my hips beneath you, teaching you how to fuck a woman properly. Soon we developed a rhythm of our own, and you became more confident, thrusting harder and deeper into my pussy. I reached down between us and showed you how to play with my clit, and bring me closer to orgasm. When I came, I cried out softly into the night air, and felt my pussy muscles clench tightly around your hard cock. That was enough to send you over the edge and you came hard, crying out my name and filling me with your hot cum. You collapsed on me, breathing hard as I wrapped my arms around you. We both lay there in silence contemplating this new development in our relationship.
We continued to fuck at every opportunity we could over the summer, until it was time for you to go off to college. Our last time together was the day before you left. Your father, as usual was going away on business the next day, so he had went to bed early. We clung to each other with the passion and love that we felt for each other, knowing it was the last time we could be together. We had already discussed our situation, and decided that when you went to college our sexual relationship would end. I was, after all, your stepmother and you had your whole life ahead of you. The next morning, we packed your car for college, and I helped you get settled into your dorm. I drove away from you that day with tears rolling down my face and a heavy ache in my heart.
Nine months later, we had a new addition to the family. All your friends thought it was really cool that you had a baby sister while you were in college. Your father was surprised at first at the news that I was pregnant, but thrilled in the end. Emma was a beautiful baby when she was born, everyone commented on how she looked just like her big brother. I just smiled at them and said I thought she looked like her father.
Now my love, you know the truth about our relationship. I can go to my death with a clear conscious and a happy heart. I write you this letter because I think you deserve to know the truth. You have always cared for Emma, please continue to look after her as you always have. I will leave it up to you to decide if you wish her to know that you are her true father. I only hope that you can forgive my foolishness in not telling you sooner.
All my love,
Anna