Lesson learned: when it comes to money, never trust a woman. If you want the relationship to stay on an even keel, just pay the freight and chalk it up.
I’m glad you got rid of her. Not all women are that way. My husband still pays, but since my salary covers all the household bills, his salary is the discretionary money; otherwise I would pick up the tab.
Many women actually fake a reach for a credit card so that they can pretend to be all independent.