what was the point of Emma saying to Regina "i'm guessing this is where your help ends" in the new episode?

Because if you don't think about it Zelena's plan doesn't just give her everything she has ever wanted but also Regina. Her mother would be alive, happy and capable of love - she might even have let her marry Dan but how knows. Snow would never have been born - even better then dead. However if you stop and think about, which Emma did not no it's means Gina most likly would not have been born and even if she was Henry wouldn't have been and that is what she cares about more then anything.

Lol I guess the point was just being annoying and dumb. I love Emma but that came out of no where :P

Emma said that because she was being Emma and sarcastic, suggesting that Regina would want to not stop Zelena from succeeding because then she wouldn't have to deal with Snow or Emma, but then Regina pointed out that Henry wouldn't be born and it became a possibility that Regina probably wouldn't exist either.

Emma said that because she thought that Regina was happy that Snow wouldn't have been born and that she wouldn't help stop Zelena.