A man from Tasmania, who set up a video camera to film ghosts in his home, caught his live-in girlfriend kissing and then having intercourse with his 16-year-old son.
However, when he confronted his 28-year-old girlfriend - who has been living with him for the past 11 years and is a mother of his young kid - she played down the October 2012 incident.
But his son admitted that he made love to her thrice in the preceding days.
In the following weeks, it was found that the couple had sex many times in a hotel room, which resulted in the man calling the cops, the New York Daily News reported.
When officers questioned her, she admitted that she had sex with the boy knowing he was 16 but she claimed to think that the age of consent was 16, when it is actually 17, and said she was "ashamed and embarrassed" by her conduct.
According to The Hobart Mercury she will be sentenced next week.
