 When Oliver tells Mandy that a relative of Luke's once had spina bifida, Mandy visits Luke in prison and tells him that he might be the father.Mandy keeps the suspicion a secret from Darren, until after the birth of DJ, she is forced to reveal that Darren may not be the father.A DNA test is taken and Oliver revealed Darren as the father but unknown to the pair, Oliver lied about the DNA tests and Luke was the father but he kept it secret for five months.