If you think this has a happy ending, you haven't been paying attention.
Speaking from personal experience as someone who feverishly inhaled George R.R. Martin's A Song of Ice and Fire series, I can attest that watching Game of Thrones with non-readers has its advantages and disadvantages. On the one hand, I get to torture my wife by casually tossing out comments that might possibly be spoilers but actually aren't (unless they actually are), and drive her insane.
On the other hand, she has no idea that Daenerys winds up marrying the King of the White Walkers, so I can't talk about how Tyrion gets eaten by one of her dragons at the White Wedding. And that's, like, the best part! It's so hard not bringing any of that up!