My sister in law Joann is five years younger than my wife and has a hot body. I am now 40 years old and have masturbated almost every day for over 20 years fantasizing about her.
Last week my wife was out shopping so I decided to jerk off in the living room. I was lying on the couch wanking my penis. I was really getting into it when I heard a giggle. I opened my eyes to find Joann standing right next to me. I tried to cover up, but Joann said it was OK, that I should just continue and she wanted to watch. Her eyes were stuck on my penis. She asked me what I thought about while masterbating. I told her that I usually thought about her giving me a handjob. She also asked me how often I jerk off. I spilled my guts and told her that I have masturbated probably over one thousand times thinking about her.
She was shocked and thought that was really cool. She said she wished she would have caught me earlier. I came twice while she watched and she said that she would like to bring her best friend to watch next time. I told her that I have masturbated several times thinking of her friend also. She got very excited and said that her and her friend would be back soon. I told her that I would like them to bust my balls and that I would do anything they wanted to me. She laughed and said that they were going to have lots of fun with me. She was late for an appointment and had to leave. She then went to the bathroom and returned with a pair of her panties for me, gave me a kiss and gave my balls a squeeze. She said that squeeze was gentle compared to what you are going to get next time when her and her friend came back. OMG what a great day.