My (F) partner (M) and I met another M/F couple on a swinging app. We all get along great and are sexually compatible. We have begun a nice friendship with them; we've hung out a few times platonically now and everyone's enjoyed themselves.

My partner and I date solo as well as engaging in group play. These friends have only swung (playing together) up to this point. She's been open about struggling with jealousy and as such been resistant to taking that step; he's been in open relationships before and is very comfortable with it. Since meeting us she has become more curious about fully opening things up. They're now talking about wanting to do that with us as their "firsts."

Here's my concern: I'm nervous about the possibility that negative/jealous feelings might be directed at me if we do this. She's admitted she doesn't know how she'll feel and thinks it's likely to be challenging for her. She still wants to move forward and the guys are (obviously) gung-ho...but I'm feeling like the only one who's risking dealing with a bunch of bad feelings directed at them as a result.

I think I'd prefer to connect with them in this way when they're not brand new to this, after she's had a chance to experience some of these feelings with someone else (who isn't wanting to maintain a friendship) hooking up with her partner. Anyone have any thoughts on how to approach this, alternative perspectives, or anything else I should be considering?