Elizabeth Hurley is trying to have a baby with husband Arun Nayar, but they "haven't had any luck so far". The actress, who has an eight-year-old son Damian, with her multi-millionaire ex-boyfriend Steve Bing, hopes to expand her family."We haven't had any luck so far. Arun would love another one. Damian does not want another one. And I think it would be great if one came along. But we're grateful for what we've got," the Daily Star quoted her as telling Zest magazine.Also, the 44-year-old beauty revealed Damian's relationship with his stepfather. She said: "Damian calls him daddy. He knows he's not his blood father. He'll sometimes forget, though, and say, ''Tell me again why dad's brown and we're so white.'' And I'll say, ''He's not blood, remember.'' And he'll say, ''Yes, I knew that.''