"I could take the bike but I think I'll take the car just to be safe," she responded, amused. "Err on the side of caution."
READ MORE: • Inside Gemma McCaw's baby shower
Garner followed up by asking what McCaw thought of Ardern taking baby Neve "onto the floor of the United Nations".
"I think in some respects she had to take her family with her," she said.
"So in terms of that it was what she needed to do at the time and I guess what she felt she needed to do, and was best during that time over there."
Last weekend McCaw posted snaps from her baby shower, sharing pictures with Richie and friends and commenting "Our baby is going to be blessed with so many special people."