NOTE: CONTAINS SPOILERS. DO NOT READ IF wewe ONLY WATCHED THE TV onyesha au HAVEN'T FINISHED aDwD (if wewe did only watch the TV show, go pick up the books. Now. They are waayyy better.)
When Daenerys goes into the House of the Undying, it is prophecied that she will know three betrayals. Both she and the mashabiki assume that this means she will be betrayed three times. I have a different theory.
The last betrayer will be Daenerys. Note that the prophecy alisema she would know three betrayals and this is the sort of book where the exact words matter. At first I thought it...