Donna should have known better.
She told her seven-year-old to get into the tub and be sure to wash your hair! - shee bellowed up the stairs.
Seven was big enough to do this herself, Donna thought as she plopped back down on the couch hoping to get a bit of writing done before the next interruption.
She was overly optimisitic. There was a problem - something about the shampoo.
She sighed, heaved herself from her comfy perch and went to investigate.
She found the shampoo, tossed it into the tub and went back downstairs.
In the morning, she went to wash her hair:
There was no shampoo