Best Friends mom

My best friend Frank's mom. I was always over at his house. One day, I walked into the kitchen to help with the dishes, like I always did. For some reason, I reached out and rubbed her ass. She froze. My hand stayed on her ass, and I patted her ass. I then started drying the dishes. She was silent, then said, 'I thought you were going to spank me?" I got thinking about what she said. The next time I came over, I whispered Have you been naughty and need a spanking? She laughed and said maybe. She changed into a dress. Now I had only kissed a girl when I was 6. Frank went outside, and before I went out, I ran my hand up her dress, and she had no panties on. My hand automatically fingered her very wet pussy. I then grabbed her pussy lips and squeezed very hard. I do not know why I did this. The look on her face was pure lust. She told me to hurt her. I shoved my hand as hard as I could into her pussy. She moaned, and Frank yelled for me. I pulled my hand out, wiped it on her face, and went out to play. We never did anything else. To this day, I think about what I could have done to her. I think I could have fucked her.