What's more, the Flip or Flop star's three children, Taylor, 12, Brayden, seven, and Hudson, three, have a close bond with Josh too.
The star recently opened up about her thoughts on expanding her family in the future with Josh too, during an interview with People.
Christina admitted that when it comes to growing her family, her and Josh's "hands are full." "We're done here. I can't even imagine that," she said on having another child. "I think my head would fall off. We're happy with the three. We're good."
Christina had nothing but praise for Josh too when it came to his role as a stepfather. "He has a lot of experience with kids even though he wasn't a father, he was the oldest of 11 other kids. He's used to little kids, and he's taken it on really well and obviously loves them," she said.
Christina shares Taylor and Brayden with ex-husband Tarek El Moussa, and Hudson with ex-husband Ant Anstead.
It's set to be a big and celebratory year for Christina too, as she will be turning 40 in July - a milestone age. In January, she opened up about turning 40 during an interview with People.
She said: "I’m approaching 40 in a few months and I feel like what I’ve heard is, in your forties, you’re the most confident and comfortable in your own skin." Christina said she was "actually excited" for her birthday and has a big trip planned to celebrate.
She added: "I don’t feel like I’m 40. Not at all. I feel like I’m 32. I don’t know what happened."
Christina is currently embarking on an exciting new chapter in her life after her long-running show with her first husband, Tarek El Moussa, came to an end in September 2022.
She now stars in Christina on the Coast and Christina in the Country, while Tarek heads The Flipping El Moussas.
Read more HELLO! US stories here
Don't want to miss a story? Sign up to our HELLO! Mail newsletter to get other stories like this delivered straight to your inbox.