"The only reason I got married in 2003 was for my children," the actress, 50, tells the British newspaper the Guardian. "I had a therapist who said marriage is really a container for a family, and that made sense to me."
Moore and Freundlich had already been together for years and had two young kids – Caleb, now 13, and Liv, 8 – by the time they wed.
Today, the actress is keen to provide a sense of stability for her children in other ways, too.
"I want to be with my husband and kids as much as I can," she says. "Some celebrities take their children everywhere with them – despite having to pull them away from school and friends. Because of my own childhood experiences, I try to work in New York or during the summer, when my family can come with me."
Moore attended nine schools as a girl, including one in Germany. And while she says it gave her "adaptability, a sense of universality," she wouldn't put her own kids through it. "It's not something I'd recommend," she says.
Moore, who left her family in Germany to attend college in the U.S., is already dreading the day when her own kids head off to university.
"It's going to be a very big deal for me," she says. "I know all these teenagers – my friends' kids – and I am always saying: 'Let me give you a piece of advice. Make sure you can drive home or take the train home, because if you have to fly, it's too far!' "