Interesting...having the ex be abusive makes his reactions make a lot more sense in a context other than him not being over her. I was distracted by the glass sweeping, but by the end of the scene I had forgotten about it & just thought he wasn't over the ex. It would make sense that he was actually afraid of her & upset that Annie put herself in a potentially dangerous situation. Also, how did she guess who Annie was? If she hadn't so much as called the guy in months, she was still keeping some sort of tabs on him.
Anyway, I thought they knew it was a last season, so reading here