Megan Fox on August 30, 2012 in Burbank, California. Credit: Karl Larsen/

Megan Fox is absolutely glowing, but that doesn't mean the pregnant actress is comfortable having her growing baby bump photographed.

Currently six months pregnant, the 26-year-old This Is 40 star attempted to hide her stomach using a takeout bag after having lunch with her husband, Brian Austin Green, 36, and her stepson, Kassius, 10, at Monte Carlo's Italian Deli in Burbank, Calif. August 30. See more photos of the family's outing.

Fox -- who has yet to speak publicly about her pregnancy -- is eager to welcome her first child with Green. "Megan is going to be a great mom," a source recently told Us Weekly. "She's already a great stepmom."

In the meantime, the actress has kept busy by lending her support to causes near and dear to her heart.

"It is unfortunate that almost half of the children in Haiti don't have access to clean drinking water," Fox wrote on Facebook August 8. "My husband and I are teaming up with Generosity Water and Sevenly to help. Every shirt sold this week will give a child in Haiti clean drinking water for 20 years!"