Pegged by neighbor

We are friendly with the neighbors next door Ken and Barbara and have been for over 35 years. We go out to dinner and occasionally go away together, to say we are good friends is the truth. We like to f**k around and tell jokes, sometimes raunchy and sometimes a little intimate about each other.
One day after a few drinks on the deck the girls started talking about our love lives and what we were doing to spice things up. Barbara said she does something special with Ken that gets both their motors running. My wife Shirley pressed Barb as to what they do, at first Barb was reluctant to say but as the drinks flowed she just blurted out that she uses a strap-on on Ken and he loves it. Well, the next thing you know Barb brings out the strap-on to show us. It was so realistic looking and at least 7 inches long, Barb said they spent the extra money to have one that mimics cumming by filling up a plastic bulb and squeezing it to simulate spraying cum. She also put it on over her shorts. To say I was turned on would be an understatement, I asked Ken if he liked it and all he said was oh yea it’s great. Barb then put it on Shirley and let her model it for us, I could tell it was turning her on because Shirley was blushing beet red but swung that Dick around like it was her own, she got behind me and pushed me to the floor and simulated fucking me in the ass.
Barb asked her if she would like to try it out on me, Shirley squeaked out a yes, Barb went to her bathroom and brought out a sheet for the floor and some KY jelly. Next thing I know Shirley is opening up my pants, pulling it and my underwater off and I’m standing there with my cock straight up. Barb says nice cock and shoves the Ky jelly up my ass, Shirley slips up behind me and slowly pushes in the strap-on. It took a few attempts but she managed to shove the whole 7 inches up my ass and slowly began stroking, all this time Ken was laughing and was starting to take his pants off, Barb all of a sudden appeared with a strap on and she began fucking Ken. It didn’t take long but both Ken and I began shooting cum all over the sheets. When it was all over, I said what just happened? Barb and Shirley said that the had been talking awhile and had set this whole thing up, even Ken was involved.
I sad it looks like the beginning of a new adventure, everyone smiled. We now get together at least once a month and Shirley is getting better with the strap-on at home.