"Mother" is a minor character in Season 2b of Fear.
Very little is known about this woman before the apocalypse except she lived somewhere in Baja California with her daughter.
After leaving the house he has shared with Sofia and Juan, Nick wanders for most of the day before settling down for the night in an apparently abandoned house. However, while he sleeps, the mother (alongside her daughter) come across him. His bloody appearance scares the mother, and she hysterically screams at Nick while hitting him with a baseball bat. She doesn't seem to understand English, as she does not allow Nick to retrieve his supplies. She continues to scream at Nick after he leaves the house.
It is unknown what happens to her or her daughter after this.