As a new member and knowing something about the law on entrapment and inducement, no one has a defence to entrapment when they have committed a "crime" of their own free will.
In this case arranging to meet a female without any inducement than the offer of sex is not entrapment.
However it may amount to an abuse of process by the police. Only way to find out is to get prosecuted and have a good defence solicitor argue the case.
Take care all, big brother is watching you