A former co-worker of Arizona teacher Brittany Zamora, who's accused of having sex with a 13-year-old student, told Inside Edition she wasn't surprised by the allegations. Zamora, 28, allegedly had sex with the boy four times, including once in her own classroom, while she told another student to act as a lookout, according to authorities. Police also released notes they say were passed between the teacher and the student. "U R sexy!" allegedly reads one.