Katie Holmes has slotted in so well to married life with Tom Cruise that Tom's children from his time with Nicole Kidman call her 'Mom' in their allotted thrice-monthly visits to her cage.

Katie Holmes revealed to Parade magazine that Tom's adopted children Isabella, 14, and Connor, 12, refer to her as 'Mom', even though 'very slightly older sister' would have probably been more apt. However, this sudden revelation is bound to upset Nicole Kidman profoundly, especially since she has said that the children now call her 'Nicole' against her wishes. Some have commented that this is all a deliberate ploy by Tom Cruise to turn the kids against Kidman, but we're not so sure - every kid knows the easiest way to get a bigger Christmas present from one divorced parent is pretend that you like the other divorced parent's new partner more than them.

Come on, that's rule number one, people.