I think you did fine by going to the recital. You stayed in the back and didn't cause any kind of issue. But you can say you were there for your kid. She'll appreciate it.
Your ex is a vicious piece of work. She's crazy mad that you're with someone else even though she's the one that left. They always want us to hang around pining for them, waiting to be plan B.
Just keep up the positivity with your daughter. You can text her that you came to see her performance, that you stayed in the back so as not to bother anyone, but that you are so proud of her and she did great. NO court will see that as a bad thing.
