Update: I actually just burned through 2 straight weeks- and Sidney was in Lauren's bedroom (in the afternoon), BUT once you've installed the spycam in Lauren's room...you're apparently locked out of that other scene. All you get to see is Sidney sitting on Lauren's bed (topless) with her back to the spycam.
Also, I noticed that once you either buy all of the camera equipment or the second to last camera item- it breaks the game. If you click on your backpack (once you have all 11) it gives you nothing but Rollback Errors (I stopped counting after 14 Ignores...). I don't know if anybody else has reported that one.
Also, also- why does the MC flip-flop back and forth about panties? Some times he's like "Hooray, panties!" and other times he's like "Why would I..." and "Ewww, gross."? Just curious.