Wednesday, January 12th 2011, 6:07 PM

French teacher Cindy Mauro (l.), 34, and Spanish instructor Alini Brito (r.), 30, were caught in a compromising position last year at James Madison H.S. Mauro was fired Wednesday for the scandal.

A second "Horndog High" teacher was fired Wednesday amid a new allegation that her sexual relationship with another teacher started years before that fateful night.

Cindy Mauro was found guilty of "extremely serious misconduct" for having a sexual encounter with fellow teacher Alini Brito in November 2009 at James Madison High School in Brooklyn during an evening student performance.

An arbitrator found Mauro's defense - that she was aiding her diabetic friend by getting her candy and that custodians and security agents were mistaken when they said they saw them naked in a classroom - "lacking in basic truthfulness."

Another Madison teacher, Maria Bucca, testified Mauro had told her she had "fooled around" with Brito eight years earlier. Mauro denied having told Bucca the two had ever been intimate.

Assistant Principal Jody Cohen also testified that immediately after the incident, Mauro told her it was "just a kiss." Mauro also denied making that statement.

The report said Mauro's "poor judgement" was compounded by her refusal to "take responsibility for her actions."

"The saying comes to mind," the report stated, "'Those who do not learn from history are bound to repeat it.'"