She also said it was too soon to talk about any new additions to the family, despite rumors that she’s expecting.
"A lot of people are saying that," she said. "I think that’s just what happens when you get together, but we already have three (kids), so not yet." (She’s mom to sons Brandon, 10, and Dylan, 8, with ex-husband Tommy Lee; Rock has a 16-year-old son, Robert James Ritchie Jr.)
Asked how the pregnancy rumors got started, Anderson joked, "Gained five pounds, maybe."
Still, she said, she wouldn’t rule out having more kids in the future. "You never know. Who knows?"
Anderson, 39, and Rock (real name: Bob Ritchie), 35, first said "I do" July 29 near Saint-Tropez, France. They then went on to hold wedding ceremonies in Beverly Hills, Nashville and, on Saturday, in Detroit – at the Clarkston Union Bar & Kitchen.
But when asked what makes a Hollywood marriage work, Anderson said, "I don’t know yet."
She also joked about her new haircut, with bangs: "I’m doing a movie right now, Blonde and Blonder, so I think I have a little funny hairstyle. I’m married, right? So I don’t have to care about my hair anymore."