Calling her filmBird Boxan “educational video on the horrors of parenting,” the 54-year-old actress said she accepted the role after her son Louis, 9, and daughter Laila, 7, asked her “why I never made anything for them.”

She continued, “I wanted you to see what being a family looks like, that sometimes you’re born into a family, sometimes you need to go find it, sometimes it finds you. But no matter how it comes together, that when it does, family is what you fight for, family is what you protect and what you saw in that movie is what your mommy would do for you. And I know that like in the movie, sometimes it looks like mommy is unraveling.”

Sandra Bullock.Kevin Winter/Getty Images

Sandra Bullock

“But that’s probably because you have pushed her to that place,” she joked. “Because first time listening means listening for the first time, not the first time you decide to listen because that’s fifth time listening. But no matter what, you are my first thought in the morning, you are my last thought at night. I was put on this earth to protect you, you are my world, I love you so much, and I will move mountains to make sure that you are safe.

In March,Bird Boxauthor Josh Malermanrevealed toEsquirethat he’s writing a sequel to his hit 2014 novel on which the movie is based — and he got the idea from watching the Netflix adaptation.

“At the end of the movie, I turned to my girl Allison and said, ‘I want to know what happens next!’ and she’s like, ‘Well, you know, you could make that happen,’ so it really was this warm feeling,” Malerman says.

TitledMalorie, the book sequel will hit shelves on Oct. 1. The story will take place eight years after the ending of the first one, and will focus on exploring Malorie and the creatures more. Netflix’s post-apocalyptic film stars Bullock, 54, as a woman named Malorie who, along with her two children, comes face to face with an entity that takes the form of people’s worst fears.

Sandra Bullock inBird Box.Netflix

Bird Box

“In the time betweenBird Boxcoming out and the time since I’ve been writingMalorie, I’ve been asked a ton of times: people want to know what happened with Boy and Girl,” he said. “But as much as I care about Boy and Girl, this isn’t their story. TheBird Boxworld is Malorie’s story, and I wanted to know more about her. I wanted to get to know her even better.”

But will the same people return if a sequel movie gets made?Bird Boxdirector Susanne Bier told PEOPLE early this year that she wanted to enjoy the success before thinking of coming back for number 2.

“We only just finished it!” she said. “It’s funny, I’m kind of reading people asking for a sequel and I’m like, ‘Hey, hey, hey, we really just finished!’ So let’s just enjoy it for now.”

source: people.com