My wife has recently expressed interest in experiencing 2 men at the same time. We've found some candidates (people we could easily walk away from if its a 1 time thing) and are in the early stages of "talking" through it. This is a fantasy of hers but shes getting nerves going into it. What are some ways to help her feel confident/comfortable and what are some things we should avoid/communicate to the potential partners.

I am not participating but will be present and our one big rule right now is no solo conversation/play. She has had FMF threesomes with and without me. She is a naturally reserved/submissive individual when it comes to sex so this is a big leap for her.

Would love to hear from women and or men that have been in this situation and how they maximized it.