I think that you are right to feel the way you do. About the other women it is strange that one would do that without knowing the other person, but there are all types of people in this world, so it is not surprising. She may have not known that he was with you and that is her personality. I am wondering why your husband was not sitting with you and the other couple was in between. I feel that if your husband respected you he would have told the woman to stop. With that being said also if he respected himself he would have told her to stop as well for that reason. It should have been his job what you did, but since he did not do it you stepped up and did it. I feel you did the right thing with the woman. You did not start a fight. You simply stated in a polite manner and she respected you and stopped. That part went well. I feel you did the right thing and he should have did that. That would make me worry what he would allow if you are not there. Sometimes when people are wrong they try to change the situation and make the other person feel bad to get themselves out of trouble. This is sometimes done on purpose, but can also be done subconsciously as well. Either way it is not correct and communicating with him about this would be best and do not allow him to make you feel bad about this or the flirting. Husbands and wives need to respect each other. That is extrelemy important in a marriage. I hope this was helpful and I wish you all the best with this!
I respect the other Expert's viewpoint, but I see this differently.
You were at a music concert. People were excited by the music and enjoying themselves. Yes...the woman behind your husband was inappropriate. However, I don't see this as a terrible, marriage threatening action. Yes..to tell her to stop touching your husband was your right to do. And, as you wrote, she stopped. She apologized. End of story.
The issue of your husband flirting and then blaming you when you confront him is a separate issue altogether. What happened at the concert is, in my experience, a symptom of a larger issue.
It seems that you are angry about his flirting, his blaming you, the sense of disrespect that you feel and so you distrust him. These need to be addressed.
Can you say more about what you are feeling? What happened last night was irritating. But it's what is underneath that situation that is really at the heart of the matter.
I would be happy to chat with you more if you would like to explore this.