Alisia, get on the phone and tell her woman...
She may feel pain for herself which you cannot protect her from, but she will be overjoyed for you both and will probably scold you for not saying so sooner.
Don't underestimate her, and acknowledge her pain as well as the pleasure she will feel at the same time. Most of the women I know don't need to be sheltered from the baby joy of our close friends/relatives.