"She looked like a soccer mom," Kody Brown once joked on Sister Wives of meeting then-single mom Robyn in 2009. "She had a van, three kids and was divorced. I thought, 'I didn't need a van, a divorced woman, and three kids in my life—that's just trouble.'"

Nearly a decade and a half on, though, they're still kicking it, the pair adding son Solomon, 12, and daughter Ariella, 7, to the squad. As for bringing on other teammates, it's not in the game plan. "I really, really struggle with it because it feels, like, 'Oh, well. Those didn't work. So, on to [someone] new,'" Robyn said on the December Sister Wives: One on One special of Meri, Janelle and Christine leaving the fold. "That's hard for me. That's really, really hard for me. It feels disrespectful."