NORWICH – A Coventry woman pleaded guilty to arson Tuesday, telling the court she poured gasoline inside her home and directed her daughter and stepfather to light it on fire.

The Chenango County Sheriff’s Office arrested 70-year-old Joseph S. Dietzman, 36-year-old Kimberly Koster and 17-year-old Chelsie M. Koster following an investigation into a Coventry blaze on Aug. 13.

Kimberly Koster pleaded guilty to third degree arson, a C class felony, yesterday in a deal with the Chenango County District Attorney’s Office that will sentence her to one to three years in state prison. Judge W. Howard Sullivan granted her a six-day furlough to get her personal affairs in order at the objection of prosecutors.

All three co-defendants were indicted Oct. 20 for third degree arson, a class C felony, and fourth degree conspiracy, an E class felony, after they allegedly collaborated in burning down the Kosters’ Coventry home.

Dietzman admitted his role in the crime Feb. 4 and pleaded guilty to fourth degree conspiracy. His plea agreement will sentence him to five years probation and includes partial payment of $5,000 restitution.

Chelsie Koster has pleaded not guilty and her case is scheduled to return to court at a later date.

Assistant District Attorney Michael D. Ferrarese said Koster collected about $5,000 in homeowner’s insurance from a Broome County provider just prior to her arrest. He said both defendants would be responsible for paying the amount back.