Sibley, Iowa Caroline Koster, age 73 of Sibley, IA died Thursday, April 1, 2010 at the Osceola Community Hospital in Sibley. Funeral service will be 1:00 p.m. Monday, April 5, 2010 at the Jurrens Funeral Home of Sibley, with Reverend Douglas Harding officiating. Burial will follow in the Holman Township Cemetery of Sibley. Visitation will be one hour prior to the service on Monday at the Jurrens Funeral Home of Sibley. Caroline is survived by three sons, Jim (wife, Jeanne) Koster of Des Moines, IA, Tim Koster of Sibley, IA and Doug (wife, Connie) Koster of Idaho; four grandchildren; one brother, Delroy (wife, Pam) Heidebrink of Sibley, IA; one sister, Liz Reekers (husband, Vernon) of Onalaska, WI; and several nieces, nephews and cousins. She was preceded in death by her parents, Tillie and Martin Heidebrink; three sisters, Almimie Lowe, Anna Mae Timmerman and M. June Salzman; and one brother, John Bud Heidebrink.