I was able to hear their conversation. They had put some bet, sis was telling him, “you cannot get nude in front of any girl.” Well this was a bol...d sentence, never thought she can ask to a boy other than me. And this question to this guy seemed perfect as he is a shy boy. He throwed same question to her, “This applies to you too. I can atleast stand in underwear, I am sure you will not even do that.” She was fast, “Bet?” He, “I bet, you can’t even do that now in front of me. Bet for Rs. 500 if. I went into full training immediately. I spanked myself with a strap, alternating that with masturbation for long periods and no ejaculation. I found I could take more pain if I started light and built up slowly. I liked the tingling afterwards. I kept to my routine of running and weight training. At 4:30 Friday, I finished my last self-spanking and masturbation session with a big, relieving spray. I knew I’d be drained when any endurance contest about cumming began. At 5:00, I got the text and. Her eyes were almost at the back of her head. "Keep Going ! Keep Going ! Oh Fuck ! Oh my God ! Im coming again!!". I felt her pussy pulse and I didn't want to cum yet so I pulled out and watched her pussy send several gushes of her cum and white cream onto the carpet. "Oh my God that was wonderful" "It was fucking fantastic !" I replied.We laid there and got our heads together and sat down on the settee for 10 minutes or so. It was almost ten o'clock. "Lets pop up the pub. Straighten your gear. " Chad moaned loudly. "Faster cousin Chad." I yelled. I moved my hips with the rythm. He moved faster and faster. His dick was in all the way now and going harder inside."I'm cumming Chad." I exclaimed."AAAHHHH, I'm cumming Angela." Chad yelled out. We laid there for a minute. We were both breathing heavy. We looked at each other and smiled."That was great, Thanks Angela." Chad said while getting up. He cleaned himself up and got dressed."Your welcome. It was great." I replied.Chad.