The Magician's Assistant:

The Magician's Assistant by: Ann Patchett
Fiction: E-book
E-Book Count:17
Book Count:25

Sabine spent years of her life as a magician's assistant.  When Parsifal the magician knew that his time was short he married Sabine.  Although the two were together for most of their adult lives, this was more a practical thing, so that her inheriting his businesses, and things went easier, as Parsifal was gay and they all lived with his lover Phan even before the wedding.   But after Parsifal suddenly died of a brain aneurysm and not the AIDS that had killed Phan, Sabine learns Parsifal's secret.  He wasn't an orphan like he said.  From there she has to make a choice, learn more about this part of his life that he keep hidden from her for years, or assume that he had good reasons for lying to her and try to move on with her life now that he is dead.