Hard on Apologies
Some people find it really hard to apologize and admit their fault. It probably comes from their childhood and the feeling they had when their parents reprimanded them for something they did. Even if they're working on it, that interim time is still annoying. Not that we'll tell them.
"I'm sorry, but you're wrong" is not an apology, you know. It's an excuse for an apology. It's embarrassing, and never do it to someone if you hurt them in the first place. Her boy is not giving her the time of day as he should.
