You were lost and scared, but a woman found you and reassured you that'd everything be okay. She was much older than you, around your step-mother's age, and she had promised to take good care of you.
"See, there's no reason to be afraid," the stranger sweetly smiled. "No bad guys are going to get you here." She asked you a lot of questions about your step-mother. Did she rest with you and hold you? Did she love you a lot? Did she do special things to make you feel good?
According to the woman, all step-mothers were supposed to do these things for their sons. So, it was important that she teach you how to touch your pee-pee to make it hard and that she show you how good it felt to have her soft hands stroke it. "It's okay if it gets bigger," she told you, "that means it feels really good."