If you haven't read the first book all the way through and haven't seen any of the show then you should be avoiding stuff like this like the plague, I've had alot of things spoiled for me so I decided to buckle down and read the books as fast as I can so no more stuff can be spoiled for me. If I were you I would watch the show as soon as you can, because there are alot worse spoilers out there and they're incredibly hard to avoid, especially when you haven't even finished the first book and everyone assumes that most people know what happens in the show so they speak freely. I do apologize if I spoiled anything but know there are way worse spoilers out there and the best way to avoid them is to catch up as fast as you can or simply avoid everything Game of Thrones/A Song of Ice and Fire related altogether, there's spoilers hiding in every comment section and I know how much it sucks to find something out before experiencing it yourself.