The main reason why it was ironic that the sisters use the "strict" rules for female conduct, which are a part of life in the Dominican Republic, to break up Fifi's romance with Manuel is that the strict rules are what helps their romance to blossom.
<h3>What is Irony?</h3>
This refers to the figurative expression that is used to show the opposite of what an author or speaker intends in a given situation.
Hence, we can see that based on the fact that Sofia's sisters do not approve of Manuel who they believe is a typical tyrant and he is also a traditional macho, they try to break their romance up.
They make use of the "strict" rules for female conduct, which are a part of life in the Dominican Republic, to break up Fifi's romance with Manuel, however, this soon backfires.
Read more about irony here:
brainly.com/question/11821145
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