A 64-year-old mother and her 43-year-old son have been allegedly caught having s3x by his wife.
The United States pair are facing the possibility of 20 years behind bars if they are found guilty on incest charges.
The son reportedly said the May 20 encounter was the first time he had ever had s3x with his mum.
“I don’t know. It just happened,” a police officer quoted him to have said so.
Lavoie was living with his mum Cheryl Lavoie at the same house at the time.
Police were called to reports of a disturbance in the house and greeted by the wife’s cousin, according to local newspaper.
The cousin reportedly told an officer that Lavoie’s wife had called her about walking in on her husband having s3x with his mum, and then had phoned 911.
The officer spoke to the mum and son separately and both acknowledged they had consensual s3xual relations and said it was the first time it had happened, police said.
When the police officer asked Lavoie why it had happened, he is said to have responded “I don’t know. It just happened,” before asking for treatment.
When the officer asked his mother the same question, she is said to have responded that they had gotten closer in recent months and it had happened after they started kissing.
Police reportedly charged the mother and son with felony incest and issued them a summons to appear in court on August 20.
Both were arraigned and released on personal recognisance and ordered by the judge to stay away from one another, according to court documents reported by local press.
They both pleaded not guilty, court documents said.
The Lavoies will return to court in October for a pretrial hearing.
According to state law, a person convicted of incest can be punished by imprisonment for between two-and-a-half to 20 years.