Cacee Cobb Credit:

A double baby moon! Back in December, a pregnant-again Jessica Simpson vacationed in Hawaii with fiance Eric Johnson, daughter Maxwell Drew, now 9 months, plus sister Ashlee and parents Tina and Joe -- and CaCee Cobb, her former personal assistant and longtime best friend. As it turns out, 32-year-old Simpson wasn't the only woman with a baby on board for the lush getaway.

About a month and a half after marrying Scrubs' Donald Faison, Cobb, 31, announced her first-ever pregnancy on Thursday (Jan. 31). But in a newly revealed photo from the Hawaiian vacation, Cobb was already beginning to rock a baby bump.  (A bikini-clad Simpson tweeted a bare baby bump picture herself on Dec. 30.)

In a snapshot from Dec. 29, Cobb frolicked in the Pacific Ocean clad in sunglasses and a small black bikini that showcase her burgeoning belly. Cobb used Facebook to announce on Thursday that she and Faison, 38, were expecting "a little stormtrooper of our own!"

For her part, Ashlee Simpson is also thrilled about her close pal's first-time pregnancy. "That's my other sister!" Simpson, 28, told Us Weekly at a bash in West Hollywood on Thursday.