A central Wisconsin woman has been sentenced to serve nine months in jail after spiking her supervisor’s coffee with anti-anxiety medication, eye drops, and other foreign substances. Fifty-six-year-old Karen Zenner, of Spencer, told investigators that she spiked the coffee in hopes her boss would forget about the $2,000 he had loaned her. Zenner later pleaded guilty to a felony count of putting foreign objects in edibles. The supervisor, a diabetic, noticed high spikes in his blood sugar and a slimy substance in his coffee. Court records say Zenner told investigators she placed the substances in the coffee for two to three weeks in January, trying to make her boss sick so that he would forget about the loan. Zenner was also sentenced to three years of probation on Monday in Marathon County Court.