Complex sentence: On September 21,1996, Drummond married Ladd Drummond, a fourth-generation member of a prominent Osage County cattle ranching family whom she refers to as "the Marlboro Man" in her books and her blog.
Split into simpler sentences: On September 21,1996, Drummond married Ladd Drummond, a fourth-generation member of a prominent Osage County cattle ranching family. Drummond refers to her husband as "the Marlboro Man" in her books and her blog.