A TEACHER accused of romping with a 16-year-old pupil in a plane toilet was in an "extremely dysfunctional" relationship, a court heard today.

Ellie Wilson, 29, allegedly had sex with the teen on a return flight from a school trip to Africa in 2015 then became pregnant with his baby

But Wilson, who denies four charges of abuse of position and sexual activity with a child, claims her ex Andrew Hall was the father.

Jurors heard today how the science teacher was in an “extremely dysfunctional" relationship with her "on-off" boyfriend.

Alex Knight, who met Wilson at York University in October 2007, told Bristol Crown Court in a statement how the pair would regularly argue.

He said: "There were lots of arguments. I would also see him, after a night out, coming home and shouting at her in a fit of rage telling her she was stupid and worthless.”

Jurors were also told he noticed Wilson had finger marks on her arm, which looked like she had been grabbed, and he also found her crying in her room with a red mark on her face.

He recalled Wilson, who he hasn't spoken to since late 2016 or early 2017, confiding in him that she was pregnant.

On what he described "the weirdest shopping trip ever", they went out to buy two pregnancy tests, some beers and some biscuits.

Mr Hall has previously told the court how he dumped Wilson because he was worried she was cheating on him.

He also claims that towards the end of their nine-year relationship their sex life “couldn’t have got worse”.

Mr Hall added that their relationship was “dysfunctional” and said he had not been “touchy-feely” with Wilson.

He said he heard Wilson on the phone telling someone "I knew you wouldn't tell anyone, I knew I could trust you" - but she later denied speaking on the phone.

Mr Hall then became more suspicious that she was having an "unacceptable" relationship with someone else so broke up with her in August 2016.

He also told the court she failed to tell him she was pregnant and later lied to him about having an abortion.

Wilson is accused of luring the schoolboy into the cubicle after drinking wine and gin and tonic before later telling him she was pregnant with his child.

The boy claims she pulled down an Agent Provocateur thong and in a police interview said the teacher "called me in" after running her hand around his penis.

He said: "We proceeded to kissing and touching and at this point she had my hand down her boxers.

"From there, she pulled down my jogging bottoms and she was placed on her knees.

"My back was against the wall and she was knelt in front of me. Then when she stood up my trousers were down anyway and she pulled her trousers down.

"It became difficult it wasn't working - she's very tall."

He also claimed Wilson told him that she loved him - but she claims the pupil was "infatuated" with her and wanted her unborn baby to be his.

The court heard she is "vulnerable to hormone-filled teenagers" and that it was “really inappropriate” to tell the boy she was pregnant.

Wilson previously told jurors sex on the plane would have been "impossible" because she was wearing hiking boots and branded claims she pulled one leg of her trousers down to romp as "like the description of a weird porn film".

But prosecutors say she lied to "cover her tracks" and tried to blame others to hide the truth of her sexual relationship with the boy.

And jurors have previously heard how she allegedly used the boy for sexual gratification and admitted sending him a text reading "Happy Valentines Day".

The pair also exchanged hundreds of other texts and she allegedly kissed the boy in his bedroom after giving him a lift home from a post-holiday school meal at Nando's, attended by other teachers and pupils.

They allegedly met again when Wilson took the boy on a date to Tintern Abbey, Monmouthshire, where they spent time "rolling around on the grass" and "kissing".

Wilson, a physics teacher, was head of Key Stage Four at a Bristol secondary school when the alleged offences took place three years ago.

She has been struck off on recommendation from the National College for Teaching and Leadership (NCTL).

The trial continues.