THE TEA ROSE by Jennifer Donnelly

This story starts out with Jack the Ripper stalking prostitutes in London in the late 1800s.  The story's main characters are Fiona Finnegan and Joe Bristo who have been in love since they were young children.  They are saving their money to buy a store of their own but currently have to work hard to help their families put food on the table.  Fiona's father is killed because he is trying to get a union started in the local tea factory and then her mother is killed by Jack the Ripper while she is trying to help a neighbor.  Fiona's loses and sister and she thinks her brother Charlie has committed suicide.  She takes money from the man who has ordered the killing of her father and takes her brother Seamie to America because she is being hunted by her father's killer.  Joe marries the daughter of his rich employer after she becomes pregnant but he is haunted by his love for Fiona.  Fiona and Joe both become wealthy merchants and later reunite.