KSBJ-351 - Married woman sharing, experiencing a wife with numbness with an experienced acquaintance... Rio Kudou

During a work break, I was talking with a primary contractor I owe a favor to. After a brief exchange of pleasantries, I got to the point. It's embarrassing to say, but I lack experience and cannot properly satisfy my wife. I asked if he would mind taking my place and satisfying her. He reluctantly agreed to my desperate request, and I sent my wife to his house...