WATCH: Charlize Theron Says She Had a Hard Time Losing Weight After 'Tully' Role: 'It Was Brutal'
"I think she kicked into mom mode," the Oscar winner said. "She was a little concerned. She saw some of the bruises and stuff."
"Because she wasn't around and she didn't see a lot of what we were doing," she added. "And when she watched the movie, I think she understood it a little bit more. But she definitely became protective."
Thankfully, with Mom's help, Theron was able to hide some of the more strenuous parts of the shoot from her kids, 6-year-old Jackson and nearly 2-year-old August.
MORE: Charlize Theron Says Her Kids Describe Her Job as ‘Playing Halloween,’ Takes Foul Shots in a Designer Dress
"I don't bring them around for a lot of that stuff," she revealed.Read more at Entertainment Tonight