Genuine Cuckold?

I have had several invites to service partnerwifegirlfrirnd while the male is present, which is very interesting. But these people expect me to contact them and turn up without knowing anything about them.

Fucking or pleasuring a woman with their partner watching is a turn-on but what can I do to ensure they are genuine and I am safe?

Or if you like the idea, let me know.
Bob
xx