Our daugther wants to have a baby brother.

My wife has a serious heart illness which gives her difficulty in bearing a child. We were just so lucky to be blessed with a beautiful daughter. But what she has gone through was never easy. It was very risky and I witnessed how she fought hard to have a successful delivery. That's why the doctor told us she must not bear a child again. Our daughter is four years old now and is asking for a baby brother. She saw a foreign neighbor of us with two kids and is wondering why she doesn't have a sibling. Isn't she adorable? I feel so bad that we cannot give her that. So my wife and I decided to adopt a child for our daughter's sake. I want her to have someone to play with too.