I want my mother-in-law to move in with us. Multigenerational households are great for the family budget, and we love having her around.

10'000 Hours/Getty Images

My mother-in-law was recently widowed. Although she is independent, in good health, and has her own home, my wife and I are considering having her move in with us. This way of living, with multiple generations of a family under one roof, is known as "intergenerational households." And it can offer some valuable benefits.