My wife is in my fifth year of marriage. Occasionally, my wife's sister, Luka, came to my house to play. The other night, at a company drinking party, I drank a little too much ... With the momentum of getting drunk, I tried to do my best with my wife who was sleeping in the bedroom and the couple's business for the first time in a while. When I woke up with a hangover the next morning, my wife and my "wife's sister" lined up in the kitchen to prepare breakfast ... "Maybe it was my wife's sister, not my wife, that I had last night ...".