I mean, she is upset about how he didn't hear her out. But she is an idiot...
Sure, I guess he could of attempted to sympathize but come on. She got too drunk at a bar and did something irreversible. In many cultures divorcee's are scrutinized and her plan clearly wasn't thinking ahead any more than 2 weeks into the future. In fact if I had feelings for her I would be upset of how impossibly short-sighted she was, any thoughts of possible marriage would become more difficult to imagine. She said yes to a date knowing the context of her situation which I would view as a breach of trust as well.
Though please don't get me wrong, he is presented as a massive tool. His speech is so possessive and he acts like his input is the only one that matters. Really needs a reality check, I could see him becoming spiteful and gossiping when the FL rejects his advances in the future.