9-week-old daughter olive on the cover of "people" and opening up about the best role of her career so far -- being a mom. telling the magazine, it's positively the best moment of my life. as life gets shorter, the stakes get higher. and this is the most important thing i will ever do. >> she wants to be the mom that's going to be there every day, picking up her kid from school so that the child knows when she needs mom or dad, they are there. >> reporter: the 37-year-old actress even wiping away tears as she spoke about her husband, art consultant will kopleman, whom she wed in june, and his ...