Complex sentence: The author, Margaret Seltzer, has been exposed as a fraud by her elder sister; in fact she has lived a middle-class life without trauma, and received a good education (which also included a course in creative writing).
Split into simpler sentences: The author, Margaret Seltzer, has been exposed as a fraud by her elder sister. In reality, she has lived a middle-class life without trauma, and received a good education (which also included a course in creative writing).