This actually happened to me four years ago.
Four years ago, my wife travelled out of town to visit her ailing sister in another state. She didn't know how long she'd be gone when she left and it had been three weeks when this happened. It was in the evening and I was out front watering our lawn. Then, I looked over next door and saw my neighbor was also watering her lawn. We soon started talking to each other and then ended up turning off the water and we sat in two lawn chairs in front of my house talking.
She was a long time divorcee who lived alone. She was around 10 years younger than I was. Our conversation soon turned to my wife's being away so long. Peg, her real name, was very much an out spoken woman and she came right out and ask me if I was taking care of myself while she was gone with a little smile on her face. I wasn't sure what she was getting at so she held her fisted hand out quickly moving it in the jerk off motion. I smiled back and answered 'What do you think' with a little smile on my face. I told her that she had even helped me once when I saw her working in her back yard one afternoon wearing some tight shorts. I told her I turned off the kitchen light and 'Took care of business'. She laughed at this.
Our talking like this got to me and I got aroused and got an erection. About that time, Peg noticed it in my pants. She said 'Looks like you need to take care of business right now' while looking at the bulge in my pants. I told her 'Yea; I guess I do'. Then, she came out and said 'I bet it would feel a lot better with a woman's hand doing it'. I just looked at her not knowing for sure what she was getting at. She then ask 'Want me to'? I ask her 'You really mean it'? She said 'Sure. Come on. Let's go inside'.
We got up and headed inside my house. I could hardly believe what we were doing. She walked ahead of me and my eyes were on her beautiful ass and legs and my cock was about to tear out of my pants it was so hard with excitment. I went to the bedroom and got a bottle of lotion and a towel. We sat on the sofa and Peg started rubbing her hand on the bulge in my pants. I then undid my pants and pulled them down freeing my hard cock. Peg got the lotion and poured some on her hand. I laid back and Peg went to running her hand over my cock. It felt so good to have this woman's hand feeling me. I then reached over feeling her thigh like I'd always dreamed about doing everytime I saw them. Peg was very much an expert at doing this and it felt wonderful. It wasn't long and I went to shooting cum all over my belly.
After this first encounter, we got together one more time before my wife returned. Peg was wanting to go to bed with me but I felt this would be going way too far as much as I wanted to. That second time, she took off her shorts and panties and I got her off with my fingers and ended up ejaculating on her when she jerked me off. A year later, Peg moved. But, I'll never forget what a good neighbor she was to me when I was badly 'in need'.