Next time you meet someone first time, start with a coffee. It give you a chance to chat and 30 mins is enough to tell if you want to organize a movie or meal on another occasion. Maybe she hated the movie and didn't want to sit there for 3 hours as it was boring for her given she could not talk....

I mean, I guess there's a possibility that she had some evil reason to play you, but it just seems odd? If she wasn't interested, why go through the effort? Has she messaged you since? Are you sure it was a fake cough? Maybe she had some other reason - e.g. period starting early or smth? It's not like she'd except to have a conversation in the cinema.. If you weren't too handsy and genuinely can't think of a reason why she would want to play you, I'd give her the benefit of the doubt.