“Chillin,” the Dallas star, 36, captioned the image with her newborn rocking matching shades.
That same day, the mom-of-two stepped out with husband Andrew Form to grab some groceries in Los Angeles, Calif.
Last month, the proud mama shared the first photo of her baby boy.
“Teaching his brother the ropes,” the actress captioned the image of her sons Julian, 2, and Rowan playing on the floor together.
Brewster and her producer husband, 44, welcomed their second child via gestational surrogate on June 9.
The actress has opened up about choosing gestational surrogacy.
“I didn’t really have a choice about being open, since it was obvious I wasn’t pregnant,” she said. “For me it wasn’t a choice; I needed to use a surrogate. But I didn’t feel judged. It’s more like I felt awkward. Sometimes I feel a little left out when other moms talk about what their birth experience was like, and I feel the loss of not having carried or having been able to carry.”
She added: “In many ways, I feel lucky that I was able to be open. There are so many women who are young and have to go through IVF and feel like they can’t talk about it, and that’s really unfortunate.”