After decades in the spotlight making blockbuster films, Sandra Bullock is happiest at home with her two children.

“Sandra hates being away from them for days or weeks at a time,” an insider exclusively explains in the new issue of Us Weekly. “The only real challenge she has in front of her is being a great mom, and to her, that requires being away from Hollywood. The one resource she can’t just write a check and buy is quality time with her kids, and that’s the thing that makes her truly happy.”

The Lost City star, 57, made headlines earlier this year when she announced her intentions to take an acting hiatus.

“I take my job very seriously when I’m at work. … And I just want to be 24/7 with my babies and my family. That’s where I’m gonna be for a while,” Bullock — who adopted son Louis, 12, and daughter Laila, 10, in 2010 and 2015, respectively — told Entertainment Tonight in March, noting that she plans to “service [their] every need” and manage their “social calendars.”

The Virginia native — who coparents her two children with boyfriend Bryan Randall — has frequently gushed about her kids and her parenting styles through the years.

“When I finished [making Bird Box], I said [to them], ‘Here, Mommy made this for you. And even though you can’t see it until you’re 21 because apparently, a movie about being a mommy is a horror film, you will know when you see it that there isn’t anything I wouldn’t do for you,’” Bullock said at the MTV Movie & TV Awards in June 2019. “I wanted you to see what a family looks like. Sometimes you are born into a family and sometimes you need to go find it. Sometimes it finds you. No matter how it comes together, when it does, family is what you fight for, family is what you protect.”

She continued at the time: “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.”

As Louis and Laila get older, it’s become increasingly important for the Hope Floats actress to spend this “special” time with them, according to a second insider.

For more on Bullock’s life as a doting mother of two, watch the video above and pick up the new issue of Us Weekly, on stands now.

Sandra Bullock says she knew when filming her upcoming movie that it would be the last time fans will be seeing her on camera for a while.

“I can be creative, I can be part of a community, but right now, work in front of the camera needs to take a pause,” the Lost City star says in an interview set to air on CBS Sunday Morning.

In a teaser for the sitdown, which will air in full on Sunday, Bullock tells Tracy Smith that she doesn’t know how long her break from acting will be — defining it only as, “until I don’t feel like I feel now when I’m in front of a camera” — but that she knows she wants to focus on her family for the time being.

She elaborates, “I want to be at home. So I’m not doing anyone any favors who’s investing in a project if I’m saying, ‘I just want to be at home.’ … Because I was always running, I was always running to the next thing. I just want to be present and responsible for one thing.”

Bullock, who is mom to son Louis, 12, and daughter Laila, 10, said she knew while filming The Lost City, which hits theaters March 25, that this would be her last film “for a while.” Bullock also elaborated on her decision to Entertainment Tonight, saying, “I take my job very seriously when I’m at work. It’s 24/7 and I just want to be 24/7 with my babies and my family.”

Still to come, Bullock has a cameo in Brad Pitt’s Bullet Train coming out in July, which was originally set for an April release. That film wrapped production in early spring of 2021.

In Lost City, Bullock stars opposite Channing Tatum in a romantic comedy that The Hollywood Reporter‘s John DeFore called an “enjoyable throwback” in his review. Pitt, in a cameo, Daniel Radcliffe, Da’Vine Joy Randolph, Oscar Nuñez, Patti Harrison and Bowen Yang also star.

Bullock had closed out 2021 starring in the Netflix movie The Unforgivable, which followed the success of her 2018 Netflix apocalyptic-thriller Bird Box.