When I was in high school I had the chance to spend some time with my friend Todd at his family's summer cabin. The best thing about going with him meant I got to see his beautiful sister Rebecca in a two piece swim suit. When I had stayed the night before at Todd's house I had got a quick peek of his sister Rebecca coming out of the shower and she had a great set of tits and a nice ass. The weekend I spent at his cabin was great as we were always going out on their boat and Rebecca was always wearing a tiny white bikini. As we got back in the boat from swimming I got a great treat as Rebecca's white bikini was bascially transparent. I loved to stare at her great tits and her perky nipples but I also enjoyed staring at her black triangle I could see through her bikini bottoms. I had not seen a pussy up close and being able to see her pussy hair through her bikini bottoms made my cock spring to life. Although she had sunglasess on I thought Rebecca was staring at my hard on since she was sitting right across from me in the boat. Knowing that she was looking at me made my cock even harder.
Later that evening as we were back at the cabin I jumped in the shower and I began to stroke my cock with the shampoo. I felt a breeze suddenly and I thought Rebecca had entered the bathroom. I heard her say she was sorry but she just had to use the bathroom. Initially I turned around so she could not see I had a hard on and then I figured what the hell so I turned around and started stroking my cock again. Rebecca was sitting on the toilet which directly faced the shower door and I could tell she could see me stroking myself. I decided to get braver and step out of the shower so she could see exactly how big my hard on was now. I stepped out and began to dry off my hair and shoulders making it look more like an accident that my towel didn't cover up my hard on and my balls. To my suprise when I turned around I saw not Rebecca but Maxine Todd's mom sitting there. I started to get embarassed but Maxine was smiling and asked me if I always got 'excited' when I took a shower. Before I could answer Maxine reached out and began to stroke my cock with her hands. Since we were only a few inches apart I just stood there and moaned when she continued to jack me off. She told me she saw me get a hardon when I was looking at Rebecca earlier but she had no idea how big my cock really was. There is nothing like hearing a woman tell you how big your cock is and I didn't care if it was Rebecca or her mom Maxine who was stroking me. Maxine then pulled her lovely tits out of her top and asked me to rub them as she jacked me off. Her tits were just as big as Rebecca's and she had beautiful perky nipples. As I squeezed her tits her nipples became erect and she began to moan like she was coming. Maxine reached down and covered my now throbbing cock with her beautiful mouth and ran her tongue under my sensitive underside. God it was a beautiful sight to look down and see this lovely sexy woman with her mouth full of my hard cock. I told her I was going to come and she told me she wanted me to come on her tits. Maxine then took my hard cock out of her mouth and as she stroked me faster I began to shoot my creamy white load all over her tits. I was so excited that my first two strands of pearly white jism shot onto her neck and the rest of my come covered her tits and ran down on her nipples as she rubbed it in. As she cleaned up she told me she wanted me to keep this a secret but if I got another hard on she would 'take care of me.'