I wish, I could give you a detailed description of the whole threesome and how it led to this memorable handjob, but for one it was ten years ago and I was drunk and stoned when it happened.
The few details, before I will come to describe what this post is about are as following. Me (M32 at the time) and my wife (F27, at that point still my fiancee) already had a threesome with a friend (F25) of us (also drunk and stoned), who liked to experiment and wanted to try a threesome (looking back at it, I think it was more her wanting to fuck me and a threesome was the only way for her to get that). At the first threesome, it was just me fucking the two girls, as our friend was still not so sure about having sex with another woman.
That changed a bit at the second threesome. We met at our friends place, watched TV, drank some beer and smoked a joint to get to the point where we all would be brave enough to start something. Eventually we ended up in bed.