Jessica T. O'Hern – suddenly, beloved daughter of  Colleen (nee Chlopowicz) and the late Timothy;  loving sister of Bridget, John (Lindsay) and Jeff O'Hern;  devoted fiancé to Casey Chapman;  adored niece of Timothy (Sue) and John (Liz) Chlopowicz and Chris (the late Tom) Yount; dear cousin of Jackie, Emilie, Eric, Christopher, Ryan, Caid and Eli;   proud graduate from Dominican University.  Visitation Friday 3-8 p.m. at Cooney Funeral Home 3918 W. Irving Park Road.  Service at 7:30 p.m.  Interment private.  In lieu of flowers, donations preferred.  Info 773-588-5850. www.cooneyfuneralhome.com