The 28-year-old, who shares three kids–son Axel Brush, 7, and daughters Evie Brush, 5, and Josephine Brush, 19 months–with her husband of about eight years, revealed that she and Caleb are expecting baby number four!

On Sunday's all-new Sister Wives, Janelle called out her ex Kody and his wife Robyn for mismanaging the situation with their youngest daughter, Ariella, early in life.

I think that's the only way I'm ever going to get any kind of decision out of him,” Janelle says of taking legal action against Kody on the Sunday, Sept. 22 episode