The offending began after Wilson visited the girls' home.
After the adults began drinking he asked to stay the night.
The court heard that when a woman was distracted on the phone in another part of the house, Wilson began telling the girls they had nice bodies but when they grew up to be teenagers they would be fat.
Wilson told them they should consider nude modelling and offered to show them pictures of other children modelling nude so they knew what positions to pose. He also suggested other children had made a lot of money by nude modelling.
Wilson placed his hand inside a pyjama top of one of the girls, caressing her upper torso.
Later in the evening, he also entered the girls' darkened bedroom and placed his open mouth on their faces.
In his summing up, Judge Harding said pre-sentencing reports showed there was no remorse from Wilson and little motivation for rehabilitation.
"You see yourself as a victim. You have problems dealing with alcohol ... there are concerns you have a high risk of reoffending with a high risk of harm to others."
Judge Harding referred to having received letters earlier that day from so-called "references".
"They were not references at all. They were three letters from your family which consisted of nothing but an attack on the process and decision of the jury."
Defence counsel Nicholas Dutch said his client's offending was on the lower end of the scale and there was no evidence to suggest it was possible Wilson could have carried out the grooming, as he did not have a camera or computer.
Wilson remained impassive as Judge Harding sentenced him.
