Here's another idea.

The player is a detective sent to investigate a crime committed at the family's home. You would need to engage the family members to find out what happened and what clues they can provide to you to solve the crime. Searching through the house looking for things that are out of place, unusual, and strange until you uncover the crime that has occurred - something that would be unnoticed by the rest of society, but completely frustrating to the family members.