Next the rules were laid out by Lois, with a little input by the girls. As agreed upon they all put in a hundred dollars into the pot. Lois insisted s...uffling saying that she didn?t think any of them knew how to handle cards. Dealing quickly they all looked at their cards. Everyone checked what cards they needed against the cards they held. Shuffling her cards around Lucy scanned her phase list smiling. Frowning at her Chloe grabbed everyone?s phase cards, "we need to make the game a little. ” I rowed straight out to the middle of the lake while Fiona stretched out in the back of the boat, eyeing me as I worked. After a short while, that suspicious wry grin came across her face.“What?” I asked.“You’re bulging,” she replied.“I’ve been working out.”“I can see that,” she said. “Your shoulders are wide and your biceps are flexing, but that’s not what I’m talking about.” She stretched her leg toward me and put her foot in my crotch. “I’m talking about here.” Then she began rubbing me. She slowly takes her bra off and let’s those big sexy tits out. They hang but have nice erect gumdrop sized nipples with dark areolas. I commented on how sexy they are and flip the quarter again. Of course I make it tails so I have to take my pants off making sure to give her a good view of the outline of my semi hard cock. ‘You’re already hard?’ It takes more than a pair of hot tits to get me hard was my response. Flip again and lo and behold heads! I give her the look and she knows what she. I still could not get over what had just happened.When my sister woke up in the morning she came into my bedroom to find out what happened the previous night and from the glowing look that she had I could see that she enjoyed herself. She knew that she had a good time because she felt so good but she said that she did not remember what happened.Weeks went on and needless to say the frequency of nights that I offered to take care of my sister increased. I quickly became an expert at oral sex..