Invitation from the neighbor while having sex with her husband

Hibiki Natsume is my neighbor. One day, like every day, I usually stood at the window and looked at my neighbor's house, but today it seemed strange that she was fucking with her husband. Even though she saw me standing there, she never locked the door and let me see her having sex with her husband. After that time, I was haunted by the extremely attractive sexual scene of my neighbor. Hibiki Natsume is like a fairy to me and one day she asked me to come over to her house and help her with a few things, maybe this was her chance.