Sophie Boyns had crept into Libbi’s room to say goodnight when she discovered the unusual whiteboard message, The Sun reports.
It reads: “I love you Daddy and Mummy. Thank you for having sex so me and Oscar (10) could come alive”
Sophie, 34, and her husband Mark, 35, were in hysterics at the unexpected thanks from Libbi.
“As I was up in her room I looked at this white board and I absolutely belted into fits of laughter,” she says.
“We’re still laughing about it.
“Oscar found it hilarious because it had the word ‘sex’ in it.”
Sophie says Libbi, who aspires to become a teacher, had requested the whiteboard and pens as a present. But it was the first time the family from Medway in Kent had seen such a message, which they have now shared on Facebook.