Sandra talks about making babies The Proposal stars tells why she is not getting pregnant

Sandra Bullock says that she’s frustrated people keep asking why she hasn't had children of her own.

The Proposal star – who married motorbike enthusiast Jesse James in 2005 and is step-mother to his three children, Chandler, 15, Jesse Jr, 12 and Sunny, five - is tired of people asking her why she hasn't had her own baby yet, reports Contactmusic.

She said, "It always seems that people want to talk about my uterus. I''m not talking about their vagina or their penis. Why are they talking about my innards?" The actress says that she avoided falling pregnant earlier in her life because she didn't want to be a selfish mother.

"I didn't want to have a child without a partner and I loved kids too much to have them right then, because I knew that the minute I have children my life would change," she said.

"And then I met Jesse and I went, ''Wow! There's that feeling of wanting to procreate because I love someone and I see him to be a good father,'' she added. The 44-year-old also says that she enjoys the challenges of looking after her step-children and loves them as if they are her own.

She told Britain's The Times newspaper, "A life is a life. Whether or not it came from your body should be secondary, in my opinion. If tomorrow I got home and went, 'Oh my gosh, I'm pregnant'. I''d be like, ''Wow! Isn't the universe amazing?'' But what I learnt was that it's being more of a parent to care for a child that''s not yours. It's harder."