NORWICH — Testifying against her own personal wishes, the former mistress of Ganesh R. Ramsaran described her nearly one-year affair in lurid detail Monday at the Chenango County Courthouse.

Six witnesses for the prosecution took the stand Monday in the trial of Ganesh R. Ramsaran, who is facing 25 years to life if the jury finds him guilty. According to the prosecution, Ramsaran killed his wife in late 2012.

Eileen Sayles, the woman named a “material witness” in the case, took the stand for at least three hours to recount her affair with Ramsaran who is charged with second degree murder in the death of his wife, Jennifer Ramsaran. In addition to Sayles, Jennifer Ramsaran’s mother, law enforcement employees involved in the case, and other individuals testified in the sixth day of the trial.

Sayles, the victim’s best friend and the woman the defendant had been sleeping with for approximately a year, became emotional a number of times during her testimony.

Sayles was arrested nearly a month and a half ago for criminal contempt for ignoring a summons compelling her to testify. “I don’t know your rules,” said Sayles to Garcia. “They came to my work in front of my coworkers … I just walked away.”

She was subpoenaed by the DA’s office.

Sayles said she had become friends with Jennifer in 2006 through their participation with the Girl Scouts.