I believe Kidman was Catholic, too. When she left Cruise, she took the adopted kids (?) and returned to the Church.
I hate to be cynical (cough, cough) but is this some lawyerly tactic to use against the Scientologists?
I was under the impression Nicole left the kids behind.
If memory serves me correctly - there was a cringe-inducing article where, either Tom or Katie, describes the 2 older ones calling Katie “mom”.