When my cherished only daughter Ichika finally married, I could not bear the thought of her moving away, so I remodeled our home into separate living quarters for two families. The newlyweds were delighted, and I looked forward to our new life together. Before long, however, my wife Maki began acting strangely. She kept visiting our daughter’s side of the house, going out on flimsy excuses, and telling obvious lies to conceal meetings with our son-in-law Shinji.