Capucine is 6 years old and she has just had a little brother, Léo. But since his arrival, her parents have only taken care of him.

Before, when Capucine came home from school, Mom would be waiting for her with a snack and they would draw together. Dad would twirl her around in the air, laughing. Now, Mom is always tired, sitting on the sofa with Leo who cries non-stop. Dad is always whispering, "No noise, the baby is sleeping."

One evening, Capucine had had enough. She went up to her room and packed her suitcase: her cuddly bunny toy, three books, her favorite dress, and her crayons. She was going to leave, so they could see how much they missed her!

She tiptoes down the stairs. In the living room, she hears crying. But it's not Leo's... it's Mom crying.

"I miss Capucine," sobbed Mom. "I feel like I'm neglecting her. She must think we don't love her anymore."

Capucine's heart sank. Dad replied gently: "We're just exhausted. But you're right, our eldest daughter needs us too. Tomorrow, I'll take her to the park, just the two of us."

Capucine puts down her suitcase. She hadn't known her parents were thinking of her. She enters the living room. "I'm here..."

Mom opens her arms wide and Capucine rushes into them. "My darling, I'm sorry. We love you so much, you know."

Dad joins her and they have a big family hug.

"It's hard having a little brother, isn't it?" asks mom, stroking her hair.

Capucine nods. "He takes up all the space."

"That's true," Dad admits. "But you know what? He's very lucky to have a big sister like you. And we're lucky to have two extraordinary children."

The following days change. Dad takes Capucine to the park every Saturday. Mom reads her a story every night before bed. And when Leo is asleep, they do activities just the three of them.

One afternoon, Capucine approached the crib. Leo looked at her with his big eyes and grabbed her finger. For the first time, she smiled. "Maybe this little brother isn't so bad after all."

She sings him a nursery rhyme, the one her mother used to sing to her when she was a baby. Leo stops crying and smiles at her.

Mom appears in the doorway, tears in her eyes. "You're a wonderful big sister, Capucine."

That evening, during dinner, Capucine announced: "Tomorrow, I want to show Leo my school. When he grows up, I'll teach him lots of things!"

Mom and Dad exchange an emotional look. Their little girl is growing up.

That night, Capucine fell asleep peacefully, her cuddly bunny in her arms. She now knew that her parents' love didn't divide, it multiplied. And she couldn't wait to see Léo grow up so she could share her games, her laughter, and her secrets with him.

Being a big sister, in the end, is perhaps the most beautiful adventure of all.