Cut (spoilers)

for the other 2 parts I think the most coherent theories are the ones I've read.

the woman was more concerned with her looks than with her child. (what was the murdered husband about though? was that the woman who had the affair killing the husband? didnt get that bit)

I think the girls were siamese twins one just hadnt developed as much because she was sort of an add on and the "older" one had most of the body

cut I think the director could not distinguish himself between his movies and real life. the woman killing him in a vampiric fashion and spitting up blood like in the earlier one. he quoted similar lines in his movies as his real life. this means the title is he doesnt know when to cut in his movies.

i think this is the thing behind cut anyway. it doesnt mean other theories are wrong its just my interpretation. maybe not well explained here but if you reply to this thread I'll try to answer questions. also if you know what the dead husband scene in dumplings was about pls tell me :P