Matthew Morrison is thinking about Naya Rivera's family, following her devastating death in July. ET's Keltie Knight spoke with Morrison — who starred with Rivera on — on Wednesday, and he shared his memories from working with her on the hit Fox musical series.Rivera was found dead in Lake Piru in Ventura County, California, on July 13, following a boating trip with her 4-year-old son, Josey, the week prior.