Joan F. Cosco, nee Basil, age 86, late of Mount Greenwood formerly of Grand Crossing. Beloved wife of the late Louis R. "Louie" Cosco; devoted mother of Jean (Dave) Mitchell, Russell Cosco, Toni (Bob) Lynch, and Luke (Kelly) Cosco; proud grandmother of Traci (Matt) Ceretto, David (Bridgette) Mitchell, Dennis (Mayra) Mitchell, Luke Cosco, Amanda Cosco, and Ryan Cosco; cherished great-grandmother of Emma Mitchell, Paige Mitchell, Elizabeth Mitchell, Lily Ceretto, and Lauren Mitchell; loving sister of the late Mary (late Bob) Canavan, her beloved twin sister Jean (late Joe) Zubeck, James (Julie) Basil, and Tony Basil; dear sister-in-law of Marian (late John) Siciliano; kind aunt of many nieces and nephews. Family will gather privately on Saturday at St. Christina Church for Mass 11:30 a.m. Interment Holy Sepulchre Cemetery. Arrangements entrusted to Thornridge Funeral Home (Janusz Family Funeral Service).