Complex sentence: Stacy Kuykendall, Willingham's then-wife and the mother of his three daughters, was not home at the time of the fire, as she was out shopping for Christmas presents at the Salvation Army.
Split into simpler sentences: Stacy Kuykendall, Willingham's then-wife and the mother of his three daughters, was not home at the time of the fire. She was out shopping for Christmas presents at the Salvation Army.