"My daughter is so thoughtful," Dad wrote.
That isn't any ticked box at the end of the note, either.
According to Gracie, it's the towel she planned to sleep on.
But users were fast to claim the note of being not real, asking why she just didn't tell him she had a bad stomach.
Dad replied: "'Hey Dad I might have the splash so I’m sleeping on a towel, love ya, goodnight,' said no 5-year-old ever."
He added that he's unbelievably inspired with how smart Gracie is: "[She’s] smart to the point I have to roll my eyes when she tries to boss me around as is normally right (like her mother).
She is wonderful"