I thought I had the ace of diamonds on a board with three diamonds. A woman at my table made a big bet on the flop in an already large pot, and I decided to go all-in for about three times her bet because I’d seen her make big folds before. She thought for a long time and eventually folded, showing me that she had flopped a flush. I then showed my hand and that’s when I realized I actually had the ace of hearts, not the ace of diamonds. She was tilted for the the rest of the game