Should I Expose Her For This?

I was struggling or pretending to sleep one night while I overheard my girl and her sister talk on the phone. & she thought it was ok to have her on speaker because i eavesdrop the whole conversation lol. The topics went from my gf sis cheating on her husband on her bday to have an gangbang to skipping a whole day of work just to go collect creampies from all of her side dudes to leave in her pussy for her husband. And he has no clue.
Ok so heres the deal. We are all grown...nothing sexual I mentioned above is a problem for me, its the fact that she is married to me. Me and my girl attend swinger parties and have collabs with other content creators on OFs. My woman is a tamed slut, loyal to her man. If she wants outside dick he has to pay and I have to record it (recording is something we just started doing to create our own OF page) and I love it. She picks a new pussy for me to try almost every payday. She loves to watch me eat out and fuck other women while she watch and record. She's paid for a dozen of strippers to do a bukkake for me and I was even forced to face fuck a few of them (best day ever!!)
We always entertain orgies and threesome, we love groupsex. When its just us sex is more like freeuse. We've fucked so damn much for almost a decade now that we will literally ignore each other during sex as if this shit is truely something casually part of our routine which is lovely because we practice tantra and kamasutra together so we have this energy where we belong to each other. My gf is a sex addict who needs to feel penetration just to concentrate and be productive, that why im with her and planning to put a ring on it yes.
You see me and my gf can legitimately do this, her sis wants to keep up but is married and he has no clue. I already told my woman that if she lets her sister come to our next hosted orgy im going to make every dude that attends use her as a cum rag, me included. I'll make sure they nut somewhere she wouldn't think to look and go home with that nut stain and he see it. Thats just triffling, if you gone be a slut do it right, either be in a open relationship (fwb, swingers or cuckold) or stay single.
She hates condoms (I'll admit no shame in, so do I) but she doesn't go about her bareback encounter correctly meaning no plan B (she is married with kids) and no proof of results for the men and doesn't clean up after exposure to semen. The last two parties she just popped up and threw her pussy around the room. I mean shes great for the atmosphere of an orgy, but shes also for the streets trying to pretend to be a wife.
Honestly I don't know how her husband dont see this shit. Like this chick let 7 different dudes nut in her no condom, and one by one. She had to get up and drive to next dude location and lay down and spread and get up and drive and lay down and spread and get up and...like the third and fourth and fifth dude and so on didn't feel that extra ooze that wasn't theirs...IDK. I know I feel the extra ooze in my gf pussy when im fucking after someone else but thats me I know what to feel for. Maybe he think shes a helluva creamer.
I'll admit that he is like a lame ass dude, they have three girls and he just watch them as they do boy duties around the house like take out the trash and bring in groceries because he just too damn lazy to do shit. Dude sit up and play games all day. So i understand that part but come on, really?
Should I expose my gf sister or should I just let that catch up to her?
Can I have some honest opinions from you guys on here?