My wife's sister Susan is a very sexy woman. Susan and I have often exchanged friendly subtle sexual comments, but I never thought she took any of our joking serviously. Last weekend my wife and I spent the weekend at Susan's house. Friday night all three of us went out for drinks and dancing and we had a great time. I had a couple of slow dances with Susan during which she playfully rubbed against my harding length while asking if I thought she was attractive. I just looked down at the bulge in pants, looked her in the eye and we both laughed.

Nothing further happened that night, so I thought it was just part of our friendly teasing game.

The next morning Susan prepared breakfast for the two of us while my wife stayed in bed.

As we were eating Susan rubbed her foot against my leg and told me how much she enjoyed dancing with me. She then rubbed my crotch with her hand and asked if I enjoyed it as much as she did. I almost choked on my food as I nodded my head. At this point I did not know what to say.

My wife was in the next room sleeping while her sister was grabing my length through my shorts. The next thing I knew Susan had my length out of my shorts and she stroked it as she knelt down between my legs. I thought I had gone to heaven when she sucked my length deep into her mouth.

I tried to keep quiet, but I must have groaned causing my wife to call out from the bedroom. Susan looked up at me with my length buried to the hilt in her mouth and I told my wife that Susan and I where just finishing breakfast. My wife went back to sleep and Susan began to bob her head up and down on my length. Getting the best play job of my life while trying to keep quiet almost drove me mad, but some how I did it. After a couple minutes of this expert length sucking I blew the biggest load of my life into Susan mouth. She swallowed as fast as she could but some cum still ran out of the corner of her mouth.

Susan then gave me a big kiss and whispered in my ear that it would be her turn next. Five minutes later my wife came out of the bedroom and asked how breakfast was. I said it was great and I had no idea her sister was so good.