Looking for advice or words of encouragement or maybe just venting to put it out there.

I’ve been in a closed MFF relationship for 5 years now and we’ve opened up recently. Along the way we’ve had many different experiences together but It’s always been a fantasy of mine to watch them give a stranger a bj but never set it up or had the courage to pull the trigger. They’re both completely enthusiastic and willing to do it and would do anything I ask but it’s the logistics and nervs that hold me back. Ideally I’d love to set up a time in a parking lot to meet the stranger one gf in the back plays woth them while me and other gf watch then same situation but switch out one for the other with another guy. I think it would be hot and a great experience. I get nervous about getting caught in public but definitely don’t want to bring strangers to my house. Any advice or just stories about your first time doing something similar would be much appreciated, vetting advice, locations suggestions, overall feedback. I’m tired of just fantasizing about it especially since they are more than willing to do so. Thanks for coming to my ted talk.