Swinton: 'Kevin' story is every woman's nightmare

Tilda Swinton says it's every mother's "nightmare" they will give birth to the "devil".

The Oscar-winning actress – who has 13-year-old twins Honor and Xavier with partner John Byrne – plays Eva Khatchadourian whose son commits mass murder in new movie 'We Need to Talk About Kevin' and she admits every expectant woman has fears of what their child will be like.