What version are you playing? Is she there in the living room during the morning? Can you click on her? There was a version of the game that had a bug there, I fixed it, but who knows.
Basically it ocurred if you did her story last.
speed-replayed it all up to that first sunday and after not going out the room directly (since it automatically starts another scene with Sue) but through the phone map to the living room, I finally got Giannah's scene to work. Still, worth a check that bug as it prevents you from advancing further (thou I suspect I've already seen all the current content) Thanks again.