Pregnant supermodel Alessandra Ambrosio is showing off her growing baby belly in a touching family vacation snapshot as a thank you to fans for their "wonderful wishes."

The Victoria's Secret stunner revealed earlier this week that she is expecting another baby with her fiance Jamie Mazur - a sister for her three-year-old daughter Anja.

And Ambrosio has celebrated the news by posting Facebook.com images of herself on a beach in a bikini with little Anja touching her bulging stomach.

In the caption for the photos, she writes, "Anja, Jamie and I are overjoyed and extremely appreciative of all the wonderful wishes we've received!! 2011 has been a year filled with incredible gifts and this is the ultimate blessing!! Anja has filled our lives with love and we can't wait to welcome the new baby into the family this spring!!"