A MAN who molested his sister on the way home from the cinema has been told to expect jail.

The man, found guilty of incest by a Swindon jury yesterday, was said to have taken his younger sister to see a Clint Eastwood film in town in the early 1980s. On the way home he told the teen it was her turn to be nice to him and he raped her in the car.

His sister, already victim of a series of sexual assaults at the hands of her father, thought it was “almost normal for her to be treated in this way by the men in her family”, prosecutor Tara Wolfe told the court.

The brother had denied incest. His father, in his 80s and deemed by a judge to be unfit to plead, had denied 12 counts of abusing his two daughters – including incest, indecent assault and inciting a child to commit an act of gross indecency.

Yesterday afternoon, the Swindon jury took three hours to find both men guilty on all counts.

Adjourning the case for sentence, Judge Jason Taylor QC told the brother: “You have been convicted by the jury of an incredibly serious offence. You must know that a significant custodial sentence is inevitable.” As an act of mercy, he said he would grant the man – his father’s main carer – conditional bail to appear before the Swindon court on Wednesday.

In a trial that lasted five days, the court heard the dad had begun abusing his older daughter in the late 1970s, after she had started secondary school.

She was asked to perform sex acts upon him in his car and a caravan. He raped his daughter in a bedroom at the family home. She said she had grown numb to the abuse: “You just switch off. It was like I was there, but not there.”

Tara Wolfe, prosecuting, suggested that the father began molesting his younger daughter after the older girl, then in her mid-teens, said she would no longer put up with the abuse.

The younger girl told police she was just four when her dad had asked her to perform sex act on him as they were parked outside shops. Later, he had simulated sex with her on numerous occasions, including once when her mum’s friend lay dying of cancer in a nearby bedroom.

In a video interview, played to the jury, the woman said he had laughed after the encounters. She had never known a normal father-daughter relationship: “The only time he wanted to know me was for his satisfaction.”

Put in the witness stand, the brother suggested the claims had been made up after his dad changed his will to cut-out all but his co-accused son. Emma Handslip, for the brother, had questioned his accuser’s account, pointing to an early police interview in which she claimed they had seen the film at Shaw Ridge cinema – not built for another 11 years.

The case was adjourned to Wednesday, September 4. The younger man has been told to expect prison. His father, having been ruled unfit to plead, could be made subject to a supervision order – a kind of community order under the direction of probation service or social services.