Blake Lively, who is expecting, hid the existence of her fourth child. Very Quiet, claims the source. The “Friends Were Surprised”

Not only Blake Lively’s admirers knew about her pregnancy.

Many of the actress’ pals were likewise “surprised” by the news when she originally announced her pregnancy on Thursday at the 10th Annual Forbes Power Women’s Summit, a source exclusively tells PEOPLE.

Even her pals were taken aback by the news of her new pregnancy, the insider claims. She was quite discreet.

Lively is a “very devoted mom,” the person adds.

The insider claims that “her kids are her primary concern over everything.” “You never would have guessed that Blake Lively, this supermodel and gorgeous woman, would be this regular person who takes care of the family and cooks dinner every night, but she is really fantastic with the kids,” said a friend.

Daughters Betty, 3, Inez, 5, and James, 7, are shared by Lively and her husband Ryan Reynolds.

Lively spoke about being a creative woman who is also an entrepreneur during a panel discussion on Thursday.

“I just like to create. Whether that’s baking or storytelling or businesses or humans, I just really like creating,” she joked, laughing along with the audience.

Lively said that it’s important for her kids to “see that you don’t have to choose one or the other.”

“I don’t need them to choose to be a businesswoman or a mom. They can be both or neither, but I just want for them to see that anything is possible.”