From this thread's article:
She grew up in Maryland, and has served in the White House as well as Miami since joining the Secret Service in 1990. She never married and has a twin sister. She is regularly seen at the gym at 5:30 in the morning and at her desk by 7 a.m. Reid graduated from the University of Maryland with a degree in criminal justice and joined the Secret Service at age 25 after visiting an NAACP job fair that sought to encourage minority applicants for law enforcement jobs.
So she's about 47 years old, never married, no kids. The classic bitter, aging feminist with a chip on her shoulder. She was probably unpopular with her non-black colleagues before this, and will be hated by them now. She should probably retire when Obama leaves office.