The Pattern of Her Heart by Tracie Peterson
Lights of Lowell Book 3- When tragedy strikes, Jasmine Houston must uproot her family from the Northern mill town of Lowell and take over her family's Southern plantation, The Willows. But upon her arrival, her anti-slavery positions cause strife between Jasmine and her neighbors and relatives. Tensions continue to rise until an explosive act--the burning of The Willows--causes Jasmine and Nolan to flee north. But the lives of the slaves they've promised to protect hang in the balance.