Ok, i did some research about this, starting from their redgif account.
Those are followup of the swap with this couple:
"
I love hearing him fuck another girl while I suck another cock. Hearing moans in the room is so 🔥"
From their reddit you can read that they did this swap with a couple meet "elsewhere", so probably friends outside of porn industry: "We have met couples and fun women through reddit, dating apps, swinger sites, and our local swing club. You have to go and be where like minded people congregate."
They say also: "No, we play with girls and couples pretty often"
Interesting, considering they did some collab but never swapped on recent productions, apparently with friends and hookups they do a lot of this things, those are gif of another occasion: