People don't always give us the answer we want in the way we want it....you said initially that she was saying no from the beginning....it was YOUR RESPONSIBILITY to hear what she was saying & to understand what she was telling you.....you did....but you refused unless she said it exactly the way you wanted to hear it.....That's NOT the way the world works. It's your responsibility to hear what people tell you even if it's not exactly using the words you are trying to FORCE them to say.

Maybe with that heavy flirting she was trying to get even with you for not listening to her in the first place?.....Just a thought.