Though still very na'ive. So to that day in the park!It had been a few weeks , and having had sex 5 times , but still Karen said 'no' to being my girl...riend though we were shopping together etc as if we were.After the shops , on a busy saturday afternoon , we stopped in a wide open grassy park in a carpark with 3 other empty cars and people and families walking along the path beside a creek about 30 yards away.We talked and giggled , with a few gropes of her tits which she always enjoyed almost. "Karen is here, waiting to get me ready to masturbate," she said."Tell me what happened tonight," I demanded."Helen came home and went to her room," she began. "Apparently, you told Karen to put the swimsuit she borrowed prominently on Helen's bed, so she knew that it was used. First she yelled at me, but I told her that it was not me. Then, when she realized that it was Karen, she demanded that I punish her."As I understood your rules, I didn't have to, but Helen insisted on calling you. I. He put more pressure on my butthole and I tried to let him in.The pain began to build and I was going to stop him when he broke through. I caught my breath in short spurts over and over as he found his way to my big muscle. He held his dick there for a moment or two and then began to move, not much more than the length of an eye blink, back and forth. I felt pressure on the muscle, but I did not feel it give, or relax. He kept the mini strokes up on me and finally it let him past about an inch.. It seemed he was finding excuses to touch me. I was way too old to sit in his lap but he liked it, and his hand would slide up my skirt to brush my panties.I think it was supposed to make me feel bad. That's what people at school would've thought. Half of them were fucking their boyfriends on a regular basis but somehow I was wrong for letting my Dad touch me?As the year progressed not much changed right away. I was still too skinny and didn't have much to fill my bra. I had nice long dark hair.