A MAN lured his teenage stepdaughter into having sex with him by signing a “contract” which agreed she could keep child bonus payments when she got pregnant. The years of abuse was condoned by the man’s wife because she was afraid to have another baby in case it had a congenital disease.The case has been called one of the most bizarre child-sex cases to come before an Australian court as the stepfather not only got the girl to sign the contract but also made her keep a false diary in which she recorded having sex with a fictional boyfriend named “Luke”.The plan was to blame “Luke” when she became pregnant.[...]The court heard the man, with his wife’s knowledge, had sex with the girl two or three times a day and she would often be kept home from school for the purpose. When police arrested the man, he told them: “Did you not see the f—— contract?”