Maggie Palmer (Webisodes)

Pre-Apocalypse
Hardly anything is known about Maggie before the apocalypse. Pretty muchall we know is that she was Palmer's wife before the apocalypse began. We know that she also had some children before all of the bad things started to happen.

After Apocalypse
Maggie was probably attending the childrens surprise party having a good time when the apocalypse began in their town. Walkers attacked the party, killing everyone except Palmer and Maggie. Her husband probably got her in the house, or left her outside to be killed and eaten by the walkers. Presumably, he went outside to see if Maggie had turned, which she had, and had bitten him. That would explain the bite on Palmer. She was shot in the head by her own husband, completely killing her and saving her from rotting as a walker.