The pupil who allegedly had an affair with a Bexleyheath Academy assistant vice-principal, described their relationship as a "dream world".

Stuart Kerner, 44, from Aylesford, is accused of six counts of sexual activity with a child and two counts of sexual activity with a child by a person in a position of trust.

The girl, who cannot be named for legal reasons, was 15 and 16 at the time of the relationship, and got to know the religious education, ethics and politics teacher - a married father-of-one - through her work in the library.

She said, in a police interview played to Inner London Crown Court today: "In March 2011 something happened between us where he basically kind of asked me what I wanted and I said I wanted him and from that moment on we started seeing each other in a different way.

"We'd go to different places in the school and be with each other. It was kind of special, I felt special, but I knew it wasn't really, and admitting that kind of hurt.

"I trusted him, I liked him, I personally thought he was good looking."

Recalling the first time they kissed, she said: "He looked at me and got a post-it note, he wrote on it to meet me outside a classroom.

"So I went up to the room. He came up afterwards and walked along the corridor to another room.

"He sat and I was standing against the desk. He looked at me and just said 'what do you want?'.

"I was a bit shy and said 'you know what I want'."

She added: "I was very forward with him. I used to put my leg over his leg and I used to call him my poof because I had my feet on him.

"We used to hold hands. He was the only reason I wanted to go to school.

"He asked me what I wanted, I said I wanted him. He kissed me on the lips.

"I didn't even know what to say. In the end I looked down at the floor and said 'that's what I want'.

"Then his wife rang which was a bit of a wake up call. He went over to the window and said he hadn't left for school because something had happened.

"He said to me 'that is why we cannot do this, because of my wife'. He said he had to leave.

"It was ten to five but by the time he left it was five because we just carried on kissing.

"I couldn't actually believe what had just happened. I was in a dream world."

The court heard the relationship, which became sexual, continued until November 2012, with the pair meeting up in classrooms all over the school, as well as on one occasion, in October 2012, at Kerner's home.

On one occasion, after she gave him oral sex for the first time in a school classroom, she said he described her as a "natural", adding "I didn't need to tell you what to do" before laughing.

The court heard today how the girl did work experience at The National Crime Agency's Child Exploitation and Online Protection Unit in the summer of 2011. 

Kerner denies all charges.

The trial continues.