A 40-year-old man could face the prospect of a jail term after admitting having sex with his own sister in the 1980s. The defendant, who cannot be named for legal reasons, is said to have fathered a child, who is now in its twenties, by the sibling. He had pleaded not guilty to raping the girl when she was still a child and was due to stand trial on that and other charges. But before a jury could be sworn in he pleaded guilty to three counts of incest on his sister starting when she was aged twelve or thirteen years old. He admitted two counts of incest between the start of 1981 and the end of 1982 and a third between the start of 1983 and October 1 1983. The married dad from Stratton pleaded not guilty to three counts of rape on his sister during the same time frames but will not stand trial on them. Michael Butt, prosecuting, told Swindon crown court that the victim had been consulted and she understood why they were being accepted. Robin Shellard, defending, said there had been a number of problems in the family in the 1980s which these days would have been spotted by social services. "It is plain that the childhoods of the whole family was extremely difficult and the sort of childhood that now would come to the notice of social services and the regime that took place years ago is not now," he said. He said his client was a man of good character who is married with children and had worked for the same employers for more than a decade. The court heard that the victim was not sure whether the abuse started when she was twelve or thirteen years old. Adjourning the case Judge Douglas Field ordered a pre-sentence report be prepared by the probation service but warned the defendant he could be jailed.