A post shared by Nick Carter (@nickcarter)The couple shares son Odin, 4, and daughter Saoirse, 15 months.In an interview with People magazine, the couple said they had doubts they would ever conceive naturally again, as they'd suffered "multiple miscarriages.""I thought I had a tumor because there was just no way that I could be pregnant, from just my medical history and the things that I did to ensure that I just had my two children," Lauren told People of her pregnancy.