Duchess Kate at London's Hope House

Kate, Duchess of Cambridge, visits Hope House, an Action on Addiction women's treatment center, on Feb. 19, 2013, in London.

Duchess Kate speaks with members of staff as she arrives at Hope House on Feb. 19, 2013, in London. The all-female rehabilitation center is one of the projects run by her patronage, Action on Addiction.

Duchess Kate speaks with members of staff as she visits Hope House, an Action on Addiction women's treatment center, on Feb. 19, 2013, in London.

Kate, Duchess of Cambridge, receives flowers from children as she leaves the Hope House charity on Feb. 19, 2013, in London.

Kate, Duchess of Cambridge, visits Hope House, an Action on Addiction women's treatment center, on Feb. 19, 2013, in London.

This picture taken on Feb. 19, 2013, shows the "baby bump" of Britain's Kate, Duchess of Cambridge, as she arrives at the Hope House charity in London.