I agree with TheOnionGirl. I don’t believe that the only way to break the curse is to kill Emma. Mr. Gold has twisted his words with Regina before to manipulate her into doing his dirty work (hince the reason for the curse being used in the first place by someone other than himself.)
I do like how you said, Slurpeez108, that Emma’s belief influences the others in Story Brooke. I am just wondering if Emma will have to take some flack for trying to hurt Henry. No one was in the room with Henry and Emma when he bit into the turnover. I see someone from Story Brooke walking and knocking on Emma’s apartment door right as Henry is falling, causing someone to become a witness to Henry’s being hurt but not able to witness how or why. I can also see Regina pinning it on Emma as a case of “If I can’t have him, then no one can.” I think it will be ironic when Regina tries to kiss Henry awake but fails; and then she has to beg Emma to try. A mother’s love for her child should work in this case because Emma and Henry love each other truly the way a mother and child do.
Even if Emma confronts Regina about the poisoned apple turnover, Regina can just claim that she must have bought a bad apple.