"Sex Tape" actress Cameron Diaz continues to fuel rumors that she's pregnant as she was snapped covering her tummy while out on a lunch date with sister-in-law, Nicole Ritchie.

"The 43-year-old star looked a little puffy-faced as she left a nearby eatery, where she offered a what looked like a reluctant smile for photographers before attempting to hide her face with her hand," said Daily Mail.

While there's nothing wrong with two girls bonding over lunch, the instinct of Benji Madden's wife to cover her tummy under a white jacket after seeing the paparazzi sent tongues wagging.

It's not the first time that Cameron Diaz covered her tummy while being hounded by photographers. When she arrived with husband Benji Madden at the LAX after a brief getaway in Australia, she was seen covering her stomach with a sling bag and loose clothing.

The latest baby rumors took off after the What to Expect When You're Expecting was seen covering her belly and drinking only water on a recent trip to Australia where her husband was taping The Voice alongside his brother, Joel," Entertainment Tonight reported.

The rumor about Cameron Diaz being pregnant with Benji Madden's baby was started by Life & Style magazine, as shared by Hollywood Life, which claimed that the newlyweds are having twins.

"Although she's just a few weeks in, Cameron is hoping her babies turn out to be a boy and a girl. She's excited to start shopping for the nursery," the tabloid said.

At this point, Cameron Diaz and Benji Madden are "very cautious" about the pregnancy but the good news is "she's very healthy and everything looks great so far.

"He's so protective of her and the babies that it's hard for him to focus on anything else. He just can't wait to be a dad," the source added of the former Good Charlotte guitarist.