Sharing the (ex) girlfriend…kind of [MFM]

This is my first ever post, so been kind.
This happened a few years ago, when i was in my early 20s, with a girlfriend I am no longer with.
So my girlfriend and I were living together at the time and we had a pretty good sex life. We had talked a bit about threesomes, mainly when we were drunk and we were both keen on the idea. So occassionally my friend Ben from high school would come visit us, when he was in town and we would have drinks and chat at our house.
One such visit Ben, my girlfriend and I had been chatting and drinking and we were all getting pretty drunk. I get really naughty when l have been drinking and I was trying to convince my girlfriend to flash Ben her tits. She laughed it off as a joke but l kept asking her. She then said to our total suprise “how about l just have sex with both of you instead”. I couldn’t believe it. I was instantly turned on. She lead us down to the bedroom and we both kissed her and undressed her. She sucked me while she jerked his cock and after he ate her pussy. It was so hot to see him touching her. But poor Ben was too drunk and couldnt go any further with her because he couldnt get hard. He just watched me fuck her and after we finished we all went back to the lougne and watched a movie and kept drinking like nothing had happened.
I have never told my wife this story and she has meet Ben many times. I would definetily let Ben fuck my wife too if the chance ever came up.

Source: reddit.com/r/gonewildstories/comments/8g6cpf/sharing_the_ex_girlfriendkind_of_mfm