Need help wife wants me to cuck Update 8

Previous Posts:

Update 7: https://www.reddit.com/r/cuckoldstories2/s/dRUeKNoWKd
Update 6: https://www.reddit.com/r/cuckoldstories2/s/UC5EM4Ch2S
Update 5: https://www.reddit.com/r/cuckoldstories2/s/GWnTf3hMOZ
Update 4: https://www.reddit.com/r/cuckoldstories2/s/1Pq8yl1VcJ
Update 3:https://www.reddit.com/r/cuckoldstories2/s/qVbxneaMYV
Update 2: https://www.reddit.com/r/cuckoldstories2/s/VNmjpBGzNg
Update 1: https://www.reddit.com/r/cuckoldstories2/s/2UGds6KpUQ
Original Post: https://www.reddit.com/r/cuckoldstories2/s/t1U4K2Bsb8

Everything had been going so well until this past weekend. We were actually happy together and spending more time as a group. Everyone’s needs were being met, and we even started a "me" night—when it's your turn, you get to choose what you want to do in the bedroom. We also decided to sleep in the same bed as much as possible to avoid jealousy. Each of us still has our own separate space, but at first, it was hard for me to sleep in a different room than my wife. We hadn't really fought, and I felt really supported by both Sam and Kevin.

But then I overheard a conversation on Saturday morning. I had gotten up early and made breakfast for everyone since I'm usually the first to wake up. We all ate on the deck off the master bedroom. I told them I was going to run to the grocery store, and they decided to jump in the shower. I left but realized I’d forgotten my wallet, so I went back to grab it from the nightstand in the master suite. The bathroom door was open, and I could hear them talking in the shower.

What I heard made my stomach drop, and I’m so conflicted. I basically overheard them talking about how perfectly everything worked out and how glad they were that their plan had worked to make this happen. From what I understood, they had talked about all of this before anything actually started. In the beginning, I told them that if this had been planned or if anything had been going on before our arrangement, I would leave. I gave them both so many chances to come clean if that was the case, and each time, they told me it just sort of "organically happened."

I haven’t confronted them about it yet, and honestly, I’m not sure if I should. If I do confront them, I feel like I’ll have no choice but to leave and end everything. I have found comfort and enjoyment in our relationship, and I don’t want to lose that. But I also know that if they did plan this, it’s beyond messed up that they didn’t tell me and put me in this position. If I confront them and don’t leave, they’ll know I’ll just accept anything, and I’ll end up being a doormat. But if I leave, I’m starting over on my own with no one, and that scares me so much.

Please, I need advice. I know some of you will say "I told you so" and might even be harsh, but that isn’t helpful right now. I don’t know the full extent of their "planning," but I feel like I was the last to know.

Help!