The 51-year-old actress and Mission Impossible star, who married in 1990, adopted daughter Isabella and son Connor during their 11-marriage, but reports of family fractions formed in the wake of their 2001 split after the children went to live with their father and followed him into the Church of Scientology.
Nicole Kidman and her children Connor (L) and Isabella (R) attend a game between the Los Angeles Lakers and the Miami Heat at the Staples Center in 2004.
"I'm very private about all that", she said in a new interview with celebrity magazine Who. She recently revealed they, as well as Isabella and Connor, motivate everything she does telling Entertainment Tonight: "I think everything is motivated by wanting to take care of your children and carve a path for them and leave them with a sense of morality, dignity and accountability".
Nicole Kidman has spoken candidly about her adopted children with Tom Cruise following claims Scientology had sparked a rift between them.
The Oscar victor is also mother to Sunday, 10, and Faith, 7 with husband Keith Urban.More news: Kristaps Porzingis gives surprising update on his condition on Instagram
"They are adults", she reasoned. So my sense of being in the world was I was working, or I was at home'.
"Sunny, Faith, I love you".
It came months after she made a similar speech at the Emmy Awards in September 2017, again only mentioning her youngest offspring.
Actor Leah Remini, 45, who left Scientology in 2013 after 30 years as a member, reiterated the allegation in her book, Troublemaker: Surviving Hollywood And Scientology.
That said, I got married very young, but it definitely wasn't power for me - it was protection.More news: Joe Root: Rare England away win a fantastic start
Kidman said at the time: "I can see now, for Lion, that it was important to me because I'm a mother with adopted children ..."
Meanwhile, Nicole recently revealed that being married to Hollywood icon Tom - whom she Wednesday in 1990 and divorced in 2001 - gave her a level of protection against sexual harassment during the early stages of her career.
"Being married to Tom Cruise at 22 is something I'm always reluctant to talk about, because I'm married now to the man who is my great love [Keith Urban], and it nearly feels disrespectful", she explained. "I would work, but I was still very much cocooned".
'When I say "protection", there is nearly like a barrier.More news: ‘Star Wars’: Diego Luna to Lead Spinoff Series