First Time Threesome: Advise?!?

SJ

My husband and I got married recently, and we’ve been together for 6 years. We have individually thought about threesomes. Him an obvious m/f/f and me f/m/m. I really could use some tips and real ground rules you all have set up before for both that worked.

For our first m/f/f one, my main overarching rule is basically that I’m ok with the girl pleasing my husband but I do NOT want him actively pleasing her if that makes sense (penetration, fingering, oral, kissing, etc). But I’m fine with her penetrating him with a toy or beads, giving him oral, and kissing his chest and neck (no mouth to mouth). I wanna try!!! but I’m also lost and mildly uncomfortable at the moment...I literally don’t want us to divorce over this 😕😔

Edit: I forgot to mention I definitely am into sexing her up and her me in front of my hubby. Just not into him penetrating her.