Surrogate Mother

Chelsey • 23 years old, married. Have two boys ages 5 months and 4 years old. Have two step sons ages 2 years and 4 years old.
I've been friends with a gay couple (two women) for some time now. Today, they asked me if I would like to be a surrogate mom for them. I'm 23 years old, married, and have a child already. All I could do was cry, the thought of being pregnant again excited me so much. They've been wanting a baby for so long and have poured $10,000 into getting pregnant their first time. The girlfriend lost the baby when she fell. They treat my son like theirs and love him so very much. Should I do this? Should I bless them with a baby they've been wanting for so long? I feel so close to them already. It was such an honor for them to ask. Gosh, I'm so excited! Would anyone of you ladies do this for a couple who can't have a baby?