A source tells ET that the HGTV star will be spending the day with the couple's two children -- 6-year-old daughter Taylor and 1-year-old son Brayden.
The trio will start the day at the family's church, The Congregation, in Yorba Linda, California, where they will spend time with their pastor and Christina's life coach, famed self-help expert Tim Storey.
After church, Christina and her cute kids, as well as their new dog, Cash, will head out to Newport Beach, where they will continue to celebrate the special day on her boat.
"They’ll have brunch on the boat and then cruise around the harbor the rest of the day," the source says, adding that Tarek will not be spending the day with the family. "She’s looking forward to a nice, relaxing day with her kids. She just wants to enjoy the day and share it with them."
According to the source, Christina remains "focused on several projects and is in a really great place."