ET has reached out to the GRAMMY winner's rep for comment.
Harper has four other children from previous relationships, including a 15-year-old son, Ellery, and a 12-year-old daughter, Jaya, with his ex-wife, Laura Dern. The former couple finalized their divorce in 2013.
The "Finding Our Way" singer and his first wife, Joana, also have two sons together Charles, 19, and Harris, 16.
Harper married Matfus, a social advocate, on New Year’s Day in 2015.