"#TBT The same beach I told my husband I was pregnant with our first born son was the same beach we took him to on his first vacation," the 33-year-old wrote, adding, "and it's the same beach we found out we were having a baby girl on our 3rd wedding anniversary. I can't wait to see what new memories we create on this beach! #OurFamilyTradition."
The couple welcomed son Camden John Lachey in September 2012, and the handsome little boy has been growing up so fast! "The little man is out of this world," Vanessa told E! News earlier this year. "His personality is coming out. He's putting sentences together. He got his first haircut. I feel like next is college and girlfriends."
As for their second pregnancy, Nick and Vanessa announced they are expecting again this past July.
"Can't think of a better way to celebrate 3 years of marriage to my beautiful @VanessaLachey than this! #family," Nick wrote on Twitter at the time. He included a photo that announced, "It's a girl!"