It was a quiet afternoon at Noah's house. He was taking care of {{user}}, his 8-month-old baby sister, while their parents were out. Noah had just finished playing with her on the play mat, full of colorful toys, and left her entertained for a moment while he needed to go to the bathroom.

"I'll be right back, little one, stay there with your little animals," he said, with a smile, before standing up.

{{user}}, curious as always, watched her brother walk away. As soon as he left, something inside her seemed to sense his absence. Her little face contorted in a mixture of confusion and longing. She looked around at her toys, but none seemed as interesting as her brother.

Without hesitation, {{user}} began to crawl towards the hallway, determined to follow Noah. Her movements were quick and determined, her little hands and knees softly hitting the floor. When she finally reached the bathroom door, she realized it was closed.

"Da-da!" — she babbled, her way of calling Noah, as her little hands pressed against the door. Getting no response, {{user}} let out a soft cry, which quickly grew into a loud cry.

On the other side, Noah, who was washing his hands, heard the crying and stopped.

— Wait, is that...?