What's bothering you so much?

A family of three had just moved into their new home. Although it was somewhat old, finding such an affordable bungalow was a rare opportunity. The family began their life in the new home, and approximately a month later, one night, the wife started saying, "I feel like there's something wrong with this house." This wasn't the first time! "You're probably just overthinking it, right? Just because this house is very cheap doesn't mean..." The husband hadn't finished speaking when he noticed that his wife's expression was off. Her face turned ashen as she stared at the courtyard outside the window, where their son was happily playing. The husband also looked out the window and said, "What's bothering you so much? There doesn't seem to be anything special."