No, I never had any sexual adventures with my stepmother, but at 39 years old and being married for 12 years, I still fantasize about what, I wish, could have been.
She moved in with us (dad and 2 brothers) when I was young, she brought her 2 boys with her. I didn't get along with her. She wasn't my mom and I didn't want to listen to her. As the years went by I despised her more.
When I was 18, I was gaining some respect for her. At this point, I somewhat understood what she went through to take care of us. I was starting to only think about girls at this point of my life and noticed that this woman was attractive. No, she wasn't the bombshell that some folks write about. She was of average size, red haired, pale complexion with freckles on most of her body.
My lust for her was first seeded when her and I were going to the store together. She got in the car and was wearing a sundress. She leaned over from the drivers side of the car to put her purse on the floorboard next to me. When she did, I glanced down her shirt. She wasn't wearing a bra and her dress was loose enough for me to see her full C cup sized tits. To this day, I will never forget the site. Her pink nipples and I noticed she had "watermelon" shaped breasts. Narrow near the chest, bulbous in the middle, and rounded near the nipples. I, instantly, got an erection. Fortunately, my erection subsided before I had to get out of the car.