Sarah Jessica Parker Praises Surrogate Mom

Sarah Jessica Parker has nothing but praise for the surrogate mom who is carrying her twin daughters, calling her a "strong, bright, independent, thoughtful, caring, gracious and generous" woman.

In an interview set to air tomorrow, the Sex and the City star tells Access Hollywood that she and her husband Matthew Broderick turned to surrogacy after they struggled to conceive a second baby.

"We have been trying to expand our family for a number of years and we actually have explored a variety of ways of doing so," Sarah Jessica, 44, says. "It would have been odd to have made this choice if I was able to have had successful pregnancies since my son's birth."

She revealed that soon-to-be big brother James, 6, knows all about the babies on the way: "I've been pretty candid with him. I kind of chartered my own course with him because we wanted to keep this quiet and so I wanted to be very careful about telling him so he wasn't burdened with a secret. On the other hand, I wanted him to have time to adjust to the idea of sharing his mama and his papa."

Though it's an exciting time for the family, SJP says that the intense media speculation surrounding the pregnancy - and the surrogate mom in particular, who Sarah Jessica says has been harassed - is making it a stressful one, too.

"On a daily basis, on an hourly basis, I am greatly concerned for her health and safety and the safe delivery of our children. Obviously there are those that don't care about her, or her health, or safety, or my children's health and safety, and that they should go to term and not go into an early labor and, god forbid, suffer all the things that can happen – that is a real possibility."

Sarah Jessica and Matthew are expecting their new arrivals this summer.