While Duff certainly has her hands full with three kids, she's making sure to share the love. "I forget how many weeks you are girl," she wrote alongside a bath time pic of Banks. "But dammit you're cute."
The actress appeared to spend much of the afternoon playing around with her older daughter, but returned for some cuddle time with Mae. "Papa and the littlest cub," Duff captioned a pic on her Instagram Story of husband Matthew Koma holding their baby girl, before adding a snuggly pic of her own.