A judge has criticised a man who sexually abused his neighbours when they were teenagers for mounting a "full-blooded attack" on them at his trial in suggesting they made up his crimes.

Michael Fieldew was 24 when he abused the two sisters between 1980 and 1982. They were between 13 and 15 during the abuse and lived across the road from him.

The case against Michael Fieldew was heard in the County Court. Credit:Vince Caligiuri

The man was friends with the family of the girls and touched them sexually when they visited his home, the County Court heard on Monday. He threatened to take one of the girls away from her family permanently if she told anyone about the abuse, and told her sister to tell others she enjoyed the abuse, the court heard.

"The trial was a full-blooded attack on both victims and their integrity," Judge Frank Gucciardo said. "It spared no detail in challenge and was not a mere assertion of innocence but was an assertion that both had fabricated their accounts."