[MF] brief encounter with wife’s sister (long)

Ok, this is the “in the light of day” kind of post. Last night my wife and I went out with her sister and husband. There was a local event at a bar we like; they had a huge tent set up in the parking lot, had to park a mile away, but great band, great booze, great time. We’ve done this kind of thing before as a foursome, so I expected the norm. I was so wrong.

I should add a little info to paint the picture. My wife and I have been married for 14 years and have an open marriage, while we try and keep it a secret, I think most people close to us have figured it out. My wife and her sister are fraternal twins and they’re nothing alike. Wife is 5’9, blonde, curvy and a very free spirit. While her sister is 5’0, brunette, petite and generally has a permanent stick up her ass. I love to give her a hard time and, despite her short fuse, I’m one of the only people that can poke fun at her without being blacklisted, which is fun.