I'm currently rewatching Season 1 of GoT. I'm currently halfway through episode 8. By now Varys has visited Ned in the Dungeon, Cersi & the small council has gotten to Sansa to write a letter to ask Robb to come down to King's Landing to bow down before bytch-ass Joffrey & Robb responds by ordering Maester Luwin to call up his Bannermen.
The scene where Sansa spills the beans to Cersi has NOT happened & I don't remember that scene when I originally watched Season 1 for the first time a couple months ago. That Scene must've happened only in the books.