“The best part of the day!” Teigen said in the clip, as Luna splashed beside her.
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Both smiled and stuck their tongues out at the camera, too — with Teigen also giving Luna a sweet kiss on the top of her head.
Teigen has always shared her favorite moments with Luna Simone on social media.
Legend, 39, agreed, telling PEOPLE in January that his daughter is “interested, for sure” in music.
Meanwhile, Teigen and Legend are busy preparing for their new baby on the way.
The Lip Sync Battle star announced that she and Legend are expecting their second child in November. Then in late January, following the couple’s appearance at the Grammy Awards, Teigen revealed on Instagram that she and her husband’s second child will be a son.
She may be excited to expand her family, but Teigen is still finding humor in even the worst parts of pregnancy.
“Why do we create these monsters they want us dead,” she jokingly added.