Published Tuesday, 04 February 2014
The case is being heard at Coleraine Courthouse. (© UTV)
The lawyers claim the allegations made by the children of one defendant are inconsistent and false.
The accused, which includes two brothers and a family friend, deny more than 50 charges including child rape, gross indecency and cruelty.
The son and daughter of one defendant claim the three men subjected them to a catalogue of sexual and physical abuse that began when they were just six and seven.
The trial has heard allegations that the girl was repeatedly raped at drinking parties in her father's home.
The defence, though, says children were never present at any drinking parties and the alleged abuse never happened.
Defence counsel Ken McMahon told the jury: "Some might think that it's so gross and awful that no one could make it up.
"Well, some people do make it up.
"In trials like this it's normally the prosecution who say look at the evidence.
"In this case it's the defence who are saying look at the evidence and you will come to the conclusion that the prosecution case does not stand up."
The trial judge Mr Gordon Kerr QC has advised the jury not to be swayed by prejudice or influenced by sympathy.
The jury is expected to consider its verdict on Wednesday.
© UTV News