Tammy ad Jonathon were star crossed lovers. They had a very rocky relationship. They were together, broke up, together, broke up etc etc.
In the end, they married. They even got custody of Jonathon's daughter, Sarah. They were set to have a blissful life. Then tragedy hit! Tammy was hit by a car. She died in the hospital after a tearful goodbye. Then Jonathon staged the car accident that looked like he and Sarah died. But they are alive. He had to do it in order to get Jonathon off his back.
Now they are starting a new life with each other. What will the Guiding Light be like without Tammy and Jonathon? I do not know, but they have big shoes to fill.