This is photo taken from television video showing former New Hampshire high school teacher Pam Smart, during an interview Feb. 18, 2000 at the Bedford Hills Correctional Facility in Westchester, N.Y., to air Monday, Feb. 28, 2000 on the WB56 "The Ten O'Clock News." In the interview Smart, was convicted in 1990 for convincing her student/teen lover to kill her husband. (AP Photo/WB56 Television)
This is photo taken from television video showing former New Hampshire high school teacher Pam Smart, during an interview Feb. 18, 2000 at the Bedford Hills Correctional Facility in Westchester, N.Y., to air Monday, Feb. 28, 2000 on the WB56 "The Ten O'Clock News." In the interview Smart, was convicted in 1990 for convincing her student/teen lover to kill her husband. (AP Photo/WB56 Television)

Pamela Smart, who was sentenced to life after her teenage lover killed her husband, claims in a new lawsuit that she was wrongly put in solitary confinement for 90 days.

Smart was a media coordinator at Winnacunnet High School in Hampton when she seduced a 16-year-old boy in 1990. He claimed she threatened to break up with him if he didnโ€™t kill her husband; she has denied planning the murder.

In a lawsuit filed this week, Smart says she was wrongly punished after a plastic utensil used to slice cheesecake was found in her cell in Bedford Hills, N.Y. Her spokeswoman told WMUR that she had had the item for 18 years and no one ever objected.

Smartโ€™s trial inspired the novel To Die For and a movie starring Nicole Kidman.