If you’re a working mom who earns good money, has childcare, and a supportive partner — and you’re still exhausted — you’re not imagining it.

A new sociological study (“Take a Load Off? Not for Mothers: Gender, Cognitive Labor, and the Limits of Time and Money”) published in Socius confirms what so many women already feel in their bones: even when mothers work full-time and earn as much (or more) than their partners, they still carry most of the mental load of family life.