Christina was spotted at a mall in Yorba Linda, California, on Tuesday, going casual in gray leggings and a sweater reading, "Pink champagne can't complain." The reality star wore big sunglasses and carried a Louis Vuitton handbag.
Christina was "subdued," an eyewitness tells ET, keeping her head down and sunglasses on. "She did not say anything," the eyewitness notes.
Tarek and Christina, who have been married since 2009, confirmed their separation on Monday with a joint statement to ET. They called an incident in May -- when police showed up to the couple's home upon receiving a call of a "possibly suicidal male with a gun" -- a "misunderstanding."
"Like many couples, we have had challenges in our marriage," the pair said in the statement. "We had an unfortunate misunderstanding about six months ago and the police were called to our house in an abundance of caution. There was no violence and no charges were filed."
Since the split, Christina has been spending time with their children -- 1-year-old son Brayden and 6-year-old daughter Taylor -- and family. Over the weekend, she Instagrammed an adorable pic of her kids posing with Santa, as well as a selfie of her and her younger sister at an Anaheim Ducks hockey game.
In a statement to ET, HGTV said the popular Flip or Flop series "will continue production as scheduled."
"During the process, we are committed to our kids and being the best parents we can be,” Christina and Tarek's statement also read. "We will continue to work through this process civilly and cooperatively, and plan to continue our professional life together."