My wife Ryoko is married at work, and this year is the 7th year of marriage.I still have a lovey-dovey love with her older sister wife Ryoko.The other day, I was invited by the president of a business partner who likes me to do swapping.I just got married to a young wife recently with this president's 3, but I usually love dirty jokes, and I'm a person who protrudes erotic, so I'm fine at that time!I said.Then I really got to do it ... Ryoko said that she was invited to have a dinner party with her wife, and she greeted the day while somehow deceiving it.She pokes at the pot and makes a toast.The president kept praising me, and it felt ticklish, but his wife was cuter than I imagined, and with this person!I was excited in a different way.Alcohol progresses and it's time to change seats.Next to the president is Ryoko, and next to me is his wife.When I was having some fun drinking, my wife suddenly got drunk, so I started to say that I went to another room with my wife.I had sex while being invited by my wife.Feeling guilty, I went to see how Ryoko was doing.The president and Ryoko are Zuppori.And it's more erotic than usual.But this is just the beginning, and it feels like the erotic feast hasn't even started yet...