Jessica Simpson Shares Super Sweet Photo of Daughter Maxwell Giving Some Sisterly Advice to Kid Brother Ace

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Jessica Simpson's daughter Maxwell takes her big sister duties seriously, as evidenced by the sweet snap the singer and fashion mogul shared with her Twitter fans on Saturday.

In the pic, 4-year-old Maxwell demonstrates the proper way to hold hair out of hot chocolate for her kid brother, Ace, 3, who sips carefully from his mug while holding his own long blonde locks out of the way.

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"Maxwell showing Ace how to not get his hair in his hot chocolate," Simpson captioned the snap, topping it off with a laughing emoji.

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This is far from the first time that Simpson's kids have glowed in front of the camera. Last November, the 34-year-old shared a behind the scenes snap from the duo's school photo shoot -- adorable doesn't even begin to cover it!

See more of the proud mama and her lookalike kids in this video.