Just skimming over that schedule, it looks like the next major Sam event won't be until the cello "concert" on Tuesday, which considering that's kind of the culmination of Sophia and Sam's interactions up to now, maybe something big will happen there (that would fit in with the "Sex in the next four playable days" window). Unfortunately, I think we're still on Saturday right now, which means there's still a hell of a wait.
I really wish that L&P would drop the side jobs to trim some of the fat. Or at least swap that for the soccer story, so maybe Zac can get into it. That tanning scene was pretty intriguing, but he just kind of disappeared.