Taking to social media, one fan posted: "To have Cain crying at Amy or Nate’s grave is too obvious even for Emmerdale.
But some fans think it won't be Nate whose funeral Cain attends in upcoming episodes.
It comes as the latest episode saw Tracy Robinson and Cain questioning why Nate had still not been in touch, not even calling on his daughter Frankie's birthday.
Fans are now wondering if Cain will end up killing his brother Caleb Miligan as their feud heats up - ahead of Caleb flatlining in hospital.
The latest theory is that it's his son Nate Robinson, following the major hint that he was the body in the lake found by Amy Wyatt recently.
