I bought a duplex with my sister in San Francisco. We share resources, split the mortgage, and babysit for each other.

Courtesy of Nicole Findlay

After college and stints abroad, my younger sister and I rented a two-bedroom apartment in San Francisco. Our living situation was glorious. We decorated our place with a mix of old and new, we binged our favorite shows, and we hosted New Year's Eve. More than once, people told us, "You can't live with your sister forever." But it turns out you can.