Yellowstone writer Taylor Sheridan played Deputy David Hale in Sons of Anarchy (2008), a show about bikers from California (or Cali for short). Q'orianka Kilcher who plays Angela Blue Water also had a role as Kerrianne Telford on Sons of Anarchy.
The reason why Beth can not have a child will be shown at the beginning of the next episode, Cowboys and Dreamers (2020).