Okay, so the hot tub preview is decidedly NOT a flashback, or some otherwise non-MC event. I'm still trying to keep my hype under control, because the idea of a foursome—and with that hashtag—is just too much to handle
I don't think DPC would make them mutually exclusive, one because that's a shitload of work just for only 1 or 2 branches. Maybe if the game was still at Season 1 sizes, like with the branching in Episode 4.
Two, I don't think he'd ever have us skip a DIK event, especially when the stupid party planning minigame needs to be used. Making us play it but not going to the party? That'd be dumb.
Three, based on the Cluck with Sage and the most recent preview with Josy, it's probably a getaway involving all the Main Girls, plus Bianca. And if it isn't, then DPC is a big asshole for the intentional misdirect.