Advice needed - wife wants to be fucked in front of group

Hi there, My wife has a fantasy of us attending a sex/tantra workshop together and she then volunteering when the instructor asks for volunteers to demonstrate on. Can anybody advise a realistic way in which this can happen? Any tantra/couples sex instructors you'd recommend for specific this fantasy you'd recommend? Any other suggestions?

Trying to Google a quick online sex instructor course so we can have the qualifications... lol

Have a look at Club Rome. People we know did that on stage about 2 weeks ago there.

Interested