The Importance of Staying Clean

My long term girlfriend, closest friends that are married recently went on vacation together. We've always been flirty with each other and after drinks and amazing first couple of days of vacation, we brought up the idea of swinging the following day. I'm now a little worried we were going to be drinking and it's going to slip out or someone may catch the four of us all hanging out unannounced - which would be very weird in our friend group because we all have group chats asking to hang out or making plans every week. My question is this. Do we rip the band aid off now and tell everyone and apologize for not coming clean immediately or continue with our little secret? Also my,