Self-taught hypnotist Timothy Porter admits vile acts while victim was in trance Woman had sought help from Timothy Porter, 40, for weight loss problems Woke from trance when she felt something touching her neck Porter, former serviceman based at RAF Leeming, had his trousers down and told her to fondle her own breasts Admits causing a person to engage in a sexual activity without consent Abuse of trust: Self-taught hypnotist Timothy Porter, 40, performed a vile act on a woman while she was in a trance A self-taught hypnotherapist faces jail after putting a woman into a trance so he could perform a lewd sexual act on her. The victim, a married mother-of-three who had been seeking help for weight loss, told police she woke after feeling something touching her neck to find Timothy Porter, 40, with his trousers down. The former RAF serviceman then ordered the horrified woman to fondle her own breasts. The attack happened while the victim's three children were upstairs asleep in her home in North Yorkshire in December last year. Porter, a fitness fanatic who had been based at the RAF Leeming, had originally promised to try and help the woman diet, Teesside Crown Court heard yesterday. But prosecution papers reveal that Porter's conduct and conversations became 'sexualised' at an early stage of their dealings. At one point he also asked her if she would like to experience 'heightened orgasms'. She declined. Porter, who has since moved to Blackburn, Lancashire, admitted causing a person to engage in sexual activity without consent. Detective Constable Graeme Bevington that Porter had no formal qualifications as a hypnotherapist and appeared to be entirely self-taught. He honed his skills 'purely as a hobby' while reaching the rank of corporal in the RAF. Advances: Teesside Crown Court that the woman had sought help with weight problems - but Porter also asked her if she wanted to experience 'heightened orgasms' 'He told us he had performed hypnosis on other people,' the detective said. 'I don't think he has any qualifications, if there are formal qualifications. He said he had been practising and teaching himself for a number of years. It is never something he has done as a profession. It was purely a hobby. The court papers reveal that he was due to leave the RAF around the time of the offence. It is not known if Porter, who is believed to be married and appeared in court with a woman, had any other clients. A source said: 'It was when she was hypnotised that he started to become a bit more lewd. He says there was nothing sexual in the lead-up to the one incident, but her account is there was some untoward behaviour. There are no other suspicions about his conduct. It's simply not known if there are other clients, but he did bill himself as an amateur hypnotist.' The case was adjourned so that the Probation Service can prepare background reports. Porter was granted bail and is due to appear for sentence on September 25. He was made to sign the sex offenders' register in the meantime - the length of registration will be decided during his sentencing. Speaking about the victim, Det Con Bevington said: 'She is ok. She is pleased it is over and done with and is now looking forward to moving on. She is pleased he has been taken to court and brought to justice for what he has done, because she feels he has abused her trust. She was quite nervous about the court process and having to face him in court and give evidence, if he had not pleaded guilty and if it had been a trial.