Complex sentence: Wozniak describes his impetus for joining the Freemasons as being able to spend more time with his then-wife, Alice Robertson, who belonged to the Order of the Eastern Star, associated with the Masons.
Split into simpler sentences: Wozniak describes his impetus for joining the Freemasons as being able to spend more time with his wife at the time, Alice Robertson. Alice belonged to the Order of the Eastern Star, associated with the Masons.