Netflix's Monster: The Lizzie Borden Story dramatizes the complicated relationship between Lizzie Borden and her older sister Emma. The historical record is more nuanced.
They were close for years
Emma was older than Lizzie and took on an important family role after their mother died. The sisters remained close through Lizzie's trial and later lived together at Maplecroft.
Emma defended Lizzie
During the 1892 murder investigation and 1893 trial, Emma supported her sister. The series changes parts of that history for dramatic effect.
Why did they separate?
The sisters' relationship deteriorated years after the trial. Their conflict was connected to Lizzie's social life and her friendship with actress Nance O'Neil.
When did Emma leave?
Emma moved out of Maplecroft in 1905. The sisters never reconciled before both died in 1927.
Monster vs history
The series depicts confrontations that are not established by surviving historical evidence. The documented timeline places the major rupture much later than the murders and trial.
Quick answer
Lizzie and Emma were close for many years and Emma defended Lizzie during the trial. Their eventual estrangement happened around 1904–1905, largely amid conflict over Lizzie's social life and Nance O'Neil.
Source
Fact-check note
This article distinguishes the Netflix dramatization from documented history. Lizzie Borden was acquitted in 1893; claims about guilt, private relationships, motives and events not established by surviving records are described as fictionalized or disputed rather than settled fact.
Netflix Tudum: The True Story · Netflix Tudum: Ending Explained · PEOPLE: Fact vs Fiction · PEOPLE: Emma/Lizzie Fact Check
Related: Lizzie and Emma Borden Estrangement: The Real Timeline Explained
Related: Who Was Nance O'Neil? The Real Actress Behind Monster's Lizzie Borden Story
