Sandra Bullock’s kids are super close, and the actress recently opened up to Ellen DeGeneres about the joys of raising siblings in such a fast pace atmosphere.

“He wanted his sister and he knew she was his sister, but now there are moments when they want to kill each other,” the mom shared, noting that Laila, 5, is more likely to get irritated with her brother Louis, 8. “But I like that about her. I like that she’ll take a knife and cut a guy.”

“She did something — I won’t say what it was — but I tried to get it out of him because he’s very honest. And he was like, ‘She didn’t do it. Maybe she did this,’ and kept coming up with different scenarios,” she recalled. “Then we put him to bed and he’s like, ‘I don’t feel well. I have this tickling in my stomach. I have to tell you something.’ I said, ‘Okay, what it is?’  He goes, ‘I can’t tell you because I just like her so much.’”