The couple say they are 'madly in love' and nothing will tear them apart.
Caleb was adopted when he was a baby and only reunited with his mum 18 years later.
Mother-of-nine Monica was just 16 when she gave birth to her son and reconnected with him over Facebook before arranging to meet up last Christmas.
They soon began a s3xual relationship and Caleb moved in with his mum and her two youngster children - his own half siblings.
In an interview with Daily Mail Online , the couple told how they are willing to risk everything to be together and have decided to go public with their affair in a bid to raise awareness of Genetic Sexual Attraction (GSA) relationships.
There relationship came to light when they were reported to the police and charged with incest.
They are banned from having contact with each other - they were interviewed separately - and live apart in Clovis, New Mexico, while they await a trial next month.