Hollywood superstar Tom Cruise has nothing to fear from his ex-wife Nicole Kidman as the actress has no plans to divulge their marriage secrets and write a memoir. The Oscar-winning-actress said that she'll never tell all in an expose and will always stay tight-lipped about her almost 10-year marriage to 'Top Gun' star,their adopted children and his Scientology beliefs,Contactmusic reported. "I would never write a memoir. There are things that happen behind closed doors,and that's where they belong. I'm not secretive. I'm protective," Kidman was quoted saying to 'Ladies Home Journal'. Kidman also admitted that she loved the curves that came with pregnancy and childbirth,as it gave her the chance to have bigger breasts. The 42-year-old star added that giving birth and nursing 16-months-old daughter Sunday Rose made her feel complete. "They're not very big,my boobs,so they just became normal size. I loved it! I felt very woman. When you've had a slightly androgynous body your whole life,having breasts is a nice feeling," she added.