I see your location states England. England and Wales can be a bit prudish when it comes to porn and the laws are confusing. For example
Human Rights Act 1998 Article 8 (right to privacy & family life) & Article 10 (Freedom of Expression). However
Obscence Publication Act 1959 defiines obscenity and what you are proposing might fall into that definition. Nonetheless with the passage of the Human Rights Act 1998 all laws must be interepreted within the framework of the Human Rights Act 1998 (for example see section 3 & 4). However with Article 8 & 10 of the Human Rights Act there are limitations such as public policy which means even though you have a right to express yourself the court may feel for example on the basis of public policy that showing is illegal. Finally in no way can this be considered legal advice due to the fact I am highlighting how conflicting the laws can be and why you need to seek out legal advice. The best thing I can recommend you do is ask a solicitor what rights you have in the UK to do this and many, not all, do offer free consultations ranging form 1/2 to an hour. Hopefully I have helped and not confused you even more.