Nick Lachey and his wife, Vanessa, took turns caring for their infant son, Camden, in Malibu on Tuesday. Vanessa was at work on the set of a commercial, and new dad Nick and the baby were by her side during the shoot. Yesterday, Vanessa stepped out for lunch with a few female friends. Nick and Vanessa welcomed their first child last month. For the most part, Vanessa has been hanging out close to home with her little one and her husband. She tweeted about celebrating Camden's 1-month birthday by baking cupcakes, and also told followers she's getting into the holiday spirit by decorating the house for Halloween.