Teacher Kandice Barber, 35, leaves Aylesbury Crown Court (Image: PA)
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A married teacher claims she is "too short" to have had doggy-style sex with a schoolboy, as she doesn't even reach his shoulders, a jury was told.
Kandice Barber was also accused of straddling the boy, 15, in her 4×4 car and then performing a sex act on him while he lay in a wooded area.
The 35-year-old, who has school-age children of her own, denied that the trysts ever took place, with her lawyer questioning the logistics of the "tiny" supply teacher having sex standing up with a much taller boy.
Jurors at Amersham Law Courts were told on Tuesday that Barber had already been convicted at a trial in September last year of sending a video to the boy.
Barber denies three counts of causing or inciting a child aged under 16 years to engage in a sexual act
Teacher, 35, 'had sex with boy, 15, and said she'd "bring him down" if he told'
Teaching assistant found guilty of sending topless pictures to 15-year-old pupil
It showed her pleasuring herself while on a bed surrounded by sex toys and sexually communicating with the complainant.
Nadia Chbat, defending Barber for the second time, questioned the alleged victim, now aged 18 and appearing by video link, over his claims that he met Barber for sexual activity on three occasions.
Ms Chbat asked: "You told the police that you were stood behind her. You had pulled your clothes down. You told the officer that your hands were on her bottom so you could see her naked bottom and she used her hands to guide you into her.
Barber's lawyer claims her client is too small to have had the sex in the way described
"You accept she is quite tiny, only about five feet isn't she, so you were taller than her at the time weren't you? You did not even think she could reach your shoulders at the time would she?"
The lawyer also questioned the boy over claims that he had been given a pregnancy scare by Barber, pointing out that a condom had been used and he had seen no problems with the device.
In cross examination, the boy could not name the specific dates when sexual activity had taken place.
The complainant is now 18 and appeared in court via video link
(Image: Vagner Vidal/Hyde News & Pictures Ltd)
But he said it was from October 11, 2018 and immediately before the school half term, with two of the meetings he said happening before his 16th birthday and one taking place afterwards.
A second occasion had taken place where Barber drove them to the side of a busy main road and parked so the boy could perform a sex act on her, before they got out of the car and she gave him oral sex.
Describing the boy's account, Ms Chbat said that the boy's account had him perform a sex act on her in the car and then get out to walk to a wooded area.
Barber leaves court with her husband Daniel
She said: "Why would you get out of the car at all? She is on top of you and you are performing a sexual act in the car. What was the need to get out of the car?
"Presumably it would have been just a matter of her body being moved down further on your trouser area?
"Instead, a decision was made to get out of the car and walk into the wooded area.
"You both walk to this wooded area and that is when you then lie down in the wooded area and you say she performed oral sex on you."
The boy agreed with that description of the events and stated that they had to get out of the car because his teacher had parked right next to a busy main road near to his home in Buckinghamshire.
In a police interview, the schoolboy told how Barber had sent him multiple illicit images of herself and a video of her masturbating while surrounded by sex toys.
Despite Barber having distinguishable tattoos, including a cup and a person on her arms, with others on her rib and thigh, the court heard how the boy had not saved other images, which only showed his teacher's body.
Barber, of London Road, Wendover, Bucks., denies three counts of causing or inciting a child aged under 16 years to engage in a sexual act.
The trial continues.