I am a 43 year old woman, and I have been having sexual fantasies about my stepdaughter for the past few years now. I have always loved her since she came into my life, and as she grew older, lust was added onto that love. She is so sweet and beautiful and shy, with long blond hair, wonderful, innocent looking features, adorable baby fat, and the sweetest voice. She is 16 now, and I have been e-mailing her, from an anonymous account, stories, pictures and videos of younger girls being with older women, especially ones where the girl was submissive. Recently I was walking past her closed door and I heard a faint noise, I put my ear to the door and sure enough I heard an adorable "uh, uh, oooh, uh". I couldn't help it, and I peeked in. She was on the computer with her back to me, one of her legs was on the desk and she was obviously masturbating. She was watching one of the videos I had sent her, at a scene where a woman my age was mounted on the face of a beautiful young girl. It is such a wonderful and loving and intense scene, and I have watched it a hundred times since. They are looking deeply into each other's eyes, and the woman is stroking the girls head and running her fingers through her hair. The way she rhythmically bucks her hips, the wet slurping and smacking sounds, the looks of ecstasy, loving kindness, and erotic triumph on the face of the woman, and the look of total devotion and surrender in the eyes of the girl are all so incredibly erotic. I shut the door and went to my room, locked the door and took off my clothes, and played the video and just masturbated non stop, cumming over and over again, thinking about what I saw, thinking of her touching herself right at that moment, and thinking of myself as the woman in the video and her as the girl. I couldn't stop, and I started cumming so hard that it hurt, and I would see explosions of stars in my head, and I had to bite my lip hard to keep from screaming, and still I couldn't stop. I started crying, because it felt so good that I felt like I was losing my mind, and because of the horrible sadness I felt, that these ridiculously intense longings will probably never be fulfilled. The sky was blue when I finally passed out, a sweaty exhausted cum soaked mess, and I slept passed my alarm, called in sick, and slept until it was already growing dark the next day.