The worst mistake I ever made

The year is 2025. 23 year old Christine is a struggling university student. One year ago, she moved from her home country Denmark, to the big New York City, together with her best friend Jacob, hoping for a new and adventurous life. On the side of studying English, Christine is a regular trumpetist at a local jazz-club, and is also slowly beginning a career in stand up comedy. Her popularity rises immensely when she is asked to become an opening act for the one and only Pete Davidson's comedy show. She accepts the opportunity, and begins touring with Pete. Pete and Christine become friends, which leads her to meet and become friends with other comedians, most importantly, John Mulaney. Christine has been a big Mulaney fan for years, so it is completely surreal to her. John is happily married to his wife, Anna, but something about this young girl attracts him.
One drunk mistake leads to another, and John and Christine and up having an affair. They are both really appealed to it, very deeply into it, and very attracted to each other. They know that it has to end at some point, but they can't seem to call it quits. It was the worst mistake Christine ever made. What happens if Anna founds out?