She is the wife of Patrick Glaser, and the step-mother of Melissa Glaser. Some time after the Boatyard Fire and the death of Sophie Ann Glaser, Patrick's first wife, she and Patrick met in unknown circumstances and probably fell in love and married. It is unknown as for now whether she's a witch.
She is possibly a member of the Glaser Family, since it is still unknown if that surname came from Sophie Ann or from Patrick.