November 24, 2015 08:30 PM

Tarek El Moussa might split parenting duties with his wife Christina, but there’s one job that the HGTV star just can’t handle: changing diapers.

But the mom of two — the couple are parents to 3-month-old son Brayden James and daughter Taylor Reese, 5 — admits steering clear of diaper duty isn’t anything new for him.

“He never changed one of Tay’s diapers and I think he has changed one of Brayden’s,” Christina jokes. “He has a bad gag reflex.”

Christa Renee

While the Flip or Flop star might get a pass on dirty diapers, Christina says the pair works really well together when it comes to caring for their kids.

“Two is really hard,” says Christina. “First of all, we had only Taylor for five years. She is like the star of the world, obviously, so it’s a big adjustment for her to not have Mommy 24/7 just to her.”

She continues, “When they go down, [Tarek] takes one and I take one and we tag team and put them to bed.”

The couple welcomed son Brayden in August after struggling to get pregnant for more than two years, going through two failed attempts at IVF — including one resulting in a miscarriage at eight weeks — all just before Tarek was diagnosed with thyroid cancer.

Christa Renee

Now with Tarek in remission, the proud parents couldn’t be more excited about the newest member of their family.

“He is the most happy baby,” says Christina. “I call him my sweet Tarek because he looks like his dad, but he’s really sweet and super chill.”

For more on Tarek and Christina’s baby joy, pick up the latest issue of PEOPLE, on newsstands now.

— Emily Strohm

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