My wife's sister

This past Christmas my wife and I spent several days at her parents home. Her older sister was there also. She has been a widow for 15 years and has not remarried. I was watching TV in the den and sis sat next to me. She had been in a grouchy mood all day and was still bitching about everything. We were alone so I leaned over and told her I know what she needed to make her happy. She said "and what would that be". I told her a good hard dick! She paused a few seconds and said "oh yea? You know where I can get one?" I smiled and said "I do in fact, I could hook a sister up" She laughed and said "yea right, with all these people around how and when?" I told her I would slip into her room tonight and take care of it. She laughed again and said "now that I gotta see!"

So later that evening I popped a viagra and went to bed with my wife. Around 2 am I got up to pee. After pissing I went down the hall and eased the door open to sis's bedroom. Closed and locked the door. I was hard as a rock as I eased over to her bedside. Barely able to see her from the night light, I leaned over and kissed her on the lips. She was awake and kissed me back. While we were kissing she reached and grabbed my hard cock. She gasped and squeezed it hard. I ran my hand down her tummy and found her fuzzy pussy and ran my finger inside the folds. She was already wet with excitement. I massaged her clit and she tensed up. I stood up and brought my cock to her face and she sucked it down and started working on it as I diddled her clit and pussy lips. I pulled away and turned her sideways on the bed, lifted her knees and dropped to mine. As I dug my tongue into her wet pussy she gasped and covered her mouth with her hand. As she held my head and pulled me in hard, I sucked and licked her to a quivering orgasm, then stood up and shoved my cock inside while she was still contracting. She immediately had another orgasm. Her old pussy was snapping on my cock like a schoolgirl. I stroked her steady and deep for a long time, bringing her off to several hard orgasms. Finally I could not hold back and fired a huge load inside. I laid across her and we kissed as my cock pumped its juice deep in her pussy. She whispered in my ear, "you were right brother", "I feel wonderful"!! I pulled out and made my way back to the bathroom to clean the juices off my cock and balls. I eased back in bed next to my wife and she never woke up. Next morning sis was happy and chipper and totally different. Every chance she got she winked at me that day. She lives in another state or I'd be fucking her regularly. But we made an agreement to fuck every chance we get from here on.