Olympia (USA) - Young fathers and their babies are often a chaotic combination. Ryan and his daughter Lucy from Olympia, Washington, are no exception. Last week, the three-month-old gave her father the first April Fool's joke of his life. Now not only Ryan, Lucy and mom Alex can laugh about the incident, but also millions of viewers on TikTok .

In the curious video, the father explains what happened with his baby in his arms. He had just brought the laundry into the room when he realized that he only had socks and the shirt had disappeared. "I thought I was losing my mind," Ryan told his wife.

The problem: smiling broadly, little Lucy holds the shirt in her hand the whole time. This is exactly how the American had walked through the house with his baby in his arms.

"You stole the shirt?" the mother asks with a laugh as she points the camera at Lucy. She grins even wider in response - caught out!

The clip has been a hit on TikTok since last week. It has already racked up more than three million clicks and a good 800,000 likes.

Mom Alex could hardly stop raving about it to Newsweek this week.

The real estate agent, who has another daughter in addition to the little girl, said: "Lucy is so funny. She's always laughing and has the most beautiful smile."

The good humor that the baby brings to her family is also a blessing because Lucy's older sister suffers from a serious illness.

The child was diagnosed with Rett syndrome a few years ago.

This is a rare genetic neurological developmental disorder that affects the development of the brain.

Lucy's love for her sister is "just so pure", said Alex, delighted with her newest family member.