"Everyone is excited about it," the source says. "She's planning on working through the pregnancy."
Producers are scrambling to come up with a story line that could mirror real life. "Molly said, 'There has to be a good explanation as to why I'm suddenly fat!'" Her character on the show has a teen daughter who's pregnant, and a mother-daughter pregnancy would be a hit with viewers, says the source. "It would push the show to its limits."
No matter what, Molly — whose daughter Mathilda is 5 — is looking forward to her next act. "She can't wait to have another baby running around the house. She's overjoyed."