I would say that her bad experience with the bitter pill has made it even harder. I don't blame her. Hopefully you can get it in a liquid.

Back when Ripley was 10 and Jazz was a kitten he got violently ill right after I gave him a pill with peanut butter on it, his favorite. It wasn't the pill that made him sick it was a blood infection that was triggered from the URI he caught from Jazz. The uri was what I was pilling him for. Poor guy almost died and was at the vet for a week. Anyway he never forgot about getting sick after eating that peanut butter pill and will run away when he smells peanut butter, even six years later. I believe cats have a better memory than elephants.