Hilary Duff Admits She Read 6-Year-Old Daughter Banks' Diary — and Shares the Surprising Note She Found

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The actress is mom to son Luca, 12, and daughters Banks, 6, Mae, 3 and Townes, 7

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Hilary Duff

Hilary Duff's oldest daughter is still getting used to being a big sister.

On Wednesday, Dec. 11, the actress, 37, shared what she found when she went snooping through her 6-year-old daughter Banks' diary. On her Instagram Stories, the mom of four posted a picture of a page that read, "My sister is the worst" — although many of the words were adorably misspelled.

Over the snap, Duff wrote, "Poor Mae getting dogged in Banks' diary, referring to her 3-year-old daughter. She also quipped, "Yea I read it..."

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Hilary Duff/Instagram

Hilary Duff's Instagram Story

Related: Hilary Duff Says 7-Month Old Daughter Townes Is Her 'Chillest' Baby — and Reveals How She's Become a Calmer Mom (Exclusive)

Duff is also a mom to baby daughter Townes, 7 months, and son Luca Cruz, 12. She shares Banks, Mae and Townes with husband Matthew Koma, and Luca with retired NFL player Mike Comrie.

Earlier this week, the singer shared that Townes is already a foodie, despite only being 7 months old. On Dec. 10, her youngest daughter and Koma appeared to be enjoying a piece of steak in an Instagram Stories video shared by the How I Met Your Father star.

Sitting in her highchair in just a diaper, Townes babbled happily while attempting to chew the meat as juices ran down her body. 

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Hilary Duff/Instagram

Hilary Duff Feeds Her 7-Month-Old Daughter Townes Steak

"Starting with steak on the 4th child. Pureés aint doing it for her," Duff joked in the caption, along with the warning, "If you're vegan maybe skip this story today."

This isn't the first time Townes has experimented with food. Duff recently recalled taking her daughter to a chef friend's house, where she put "a big glob" of gourmet quiche in her mouth — and started "choking a little."

"Normally, I'd be panicked," Duff said in an exclusive interview with PEOPLE, "and now I'm waiting, waiting, 'Oh good, you worked it out.' "

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