"You know what? She's my mom. If she wants to show up in spandex and a tube top, go girl!" Wynonna told ET's Nischelle Turner.
But Wynonna didn't let her frustration go unaddressed. Apparently, she made sure Robin apologized for his words.
"So I'm downstairs in my dressing room and Wynonna came in like a raging bull," Naomi recounted. "She said, 'He's coming down stairs now!' And I went, 'Why?' And she said, 'Because he's going to apologize to you!"