Cheryl Lavoie and Tony L. Lavoie confessed to having sexual relations with each other in their home on Clarendon Street, Fitchburg, back on May 20, according to authorities.

Tony allegedly told cops ‘it just happened’ and insisted it was the first time he had sex with his mom.

Cheryl reportedly said they had grown closer in recent months and started having sex when they began kissing.

The mother and son were living together in the same house at the time of the alleged encounter.

Both Tony and Cheryl allegedly admitted to the officer separately that they had consensual sexual relations with each other and told them it was the first time it happened.

When the officer asked the Lavoies why it had happened, Tony allegedly said: ‘I don’t know. It just happened.’

The 43-year-old then said he wanted treatment for it, according to police.

Cheryl allegedly told cops the incestuous encounter happened after she and her son had become closer over the last few months and then started kissing.

The mother and son duo were charged with incest – a felony that carries a maximum sentence of 20 years in prison.

They made their first court appearance Thursday where they both pleaded not guilty.

They were arraigned and released on personal recognizance, with the judge ordering the pair to stay away from each other, according to court records.

The Lavoies are scheduled to appear in court for a pretrial hearing on October 27.