A Spencer woman is going to jail for spiking her boss’s coffee in hopes he would forget she owed him 2-thousand dollars. 56 year old Karen Zenner pleaded guilty in Marathon County Court Monday and was placed on three years probation ,which includes nine months in jail. Her boss at an Athens business is a diabetic. He noticed spikes in his blood sugar, and a video camera in the breakroom showed the Zenner near his coffee cup. Zenner spiked his coffee with eye drop solution and anti-depressant pills.