It’s been nearly three weeks since Michael Bublé and Luisana Lopilato welcomed their first baby girl, Vida Amber Betty Bublé , who joins the couple’s two adorable boys, Elias, 2, and four-year-old Noah. The Argentinian actress took to her Instagram story on Monday (Aug. 13) to share the first glimpse of her adorable newborn baby – and give the cutest insight into how her sons are taking care of their new sister!

Before the photo, Luisana wrote in her native language of Spanish: “I told my sons that they have to help me protect their sister because she’s very small … And one of them took it very seriously,” she wrote, followed by one of her sons adorably dressed up as Spiderman. She continued: “And the other took it as a joke,” with a photo of her other son wearing a Hulk mask.

The story continued: “The first gift that they gave their sister is … their imagination? Of course!” Finally, the actress shared a photo of the back of her newborn baby’s head, with a small Spiderman toy in front of her.

Clearly, Vida is in the safest of hands, with her two big brothers (and some Marvel superheros!) around to protect her, not to mention her doting parents. On July 25, the day she was born, the 31-year-old model shared a heartwarming black-and-white photo of her baby’s hand, writing: “How to explain that our heart explodes with love? That there’s not enough hours in a day to think about it. I thank God for making us this gift of life and happiness! Because looking in her eyes is like looking at heaven itself!”

She continued: “We love you to infinity and beyond. We waited for you not only to grow as a family … you gave us light, hope, you are and will be our souls’ life.” The darling little girl was born weighing 6lb 1oz on July 25, just two days after her mom shared another black-and-white photo of herself cradling her baby bump with the caption, written in Spanish: “Enjoying the most beautiful little kicks of life, I will miss being like this but I will be happier to meet you sand have you in my arms… we are waiting for you with great joy!!”

Filed under: First glimpse Michael Buble's newborn