Endless Readers discussion

I don’t know if anyone can help me, but I am looking for the name of a book. Setting- colonial America/New England. Plot- entitled sister convinces nice sister to steal letters and a silver cup back from a rugged Scottish frontiersman. She gets caught, her family abandons her. She is sentenced to be the Scott’s indentured servant. She takes care of him and his strange sister.

Amanda wrote: "I don’t know if anyone can help me, but I am looking for the name of a book. Setting- colonial America/New England. Plot- entitled sister convinces nice sister to steal letters and a silver cup bac..."

Do any of these ring a bell?

My Name is Resolute
The Sun Sister
The Pearl Sister
The Stolen Letters
The Mitfords: Letters Between Six Sisters
Letters from My Sister