It felt like I was cumming, it felt so good. I had often massaged that area when I was masturbating, but I didn’t realize how good it felt to have i...t stimulated. I extended my toes more and Jon’s balls bounced off my perineum harder. It became intense. I was shuddering form the sheer pleasure of it. I was moaning uncontrollable and babbling about how good it felt. “You like getting fucked bitch. I have never seen a slut like you before. You are such a whore,” Jon said as he started speeding up. Suddenly she turned back looked at me and to my surprise she was not at all ashamed of what she was doing. I too got aroused by watching wat my sister was doing. I sat next to her and asked her on wat she thinks of having sex wit me. She was so aroused that she didnt evn reply me but just started kissing me. I then started pinching her nipples and she was getting more aroused. I could see her round beautiful breasts in the dim ponr lite. I took off her dress and was kissing her all over then i. Taking my lips from Allan’s hardness I looked down to see Paul kneeling between my legs holding his erection. He grinned, saying ‘this won’t hurt’. Without a further word he thrust his shaft into my pussy. He was wrong. It did hurt, but only briefly. The pain was sharp and burning as his erection ruptured my hymen. Then a wonderful feeling swept through me as I felt his hardness stretch my labia and slide deep inside. Instinctively I contracted my vaginal muscles around his. As soon as she pulls out of the parking I felt an ache deep in my chest, but didn't show. Allison on the other hand was completely transparent. The blue eyes we both share are on the verge of tears. I move in and give her a hug and her arms gripped around me tightly. "Since we'll have to be here for a month we might as well have a good time," I told her. She took a deep breath and long hair pressed against the right side of my face. In my head I thought about the contrast between my brown hair.