Nikki Bella and son

Credit: Nikki Bella/Instagram

Nikki Bella is opening up about her biggest mom challenge to date.

During a new episode of The Bellas Podcast, Nikki sits down to chat with Brie Bella while the sisters are in Lake Tahoe together on vacation with their families. Nikki says that during the trip, her 23-month-old son Matteo Artemovich, whom she shares with Artem Chigvintsev, came down with "a really bad stomach bug ."