She was baking cupcakes when she was hexed by Maggie. Jenny found beating hearts in the cupcakes and soon choked on blood. Sam and Dean Winchester burst in and found the hex coin and destroyed it. After giving her a chance to freak out, Sam and Dean inquired about the story that Don slept with her, but Jenny denied it with discomfort. Sam and Dean later told her to leave town for a bit due to her life being in danger.
The brothers were warned about a possible danger to her by Crowley, and entered her house. After a little searching, they found her burnt body in her oven. Crowley then contacted the Winchesters to reveal that he is now targeting everyone that they have ever saved until they give up the Trials of God.
- She was named after the writer of the series, Jenny Klein.
- Its unclear if Crowley used a spell to compel Jenny to cook herself in her own oven as he used spells to kill Tommy Collins and Sarah Blake or if a demon did it.