Though Liza was apologizing, she didn't look apologetic at all. Her so-called apology was closer to mocking Harvey.
Donald and Wilhelm watched this scene unfold with a dry smile. They didn't stop Liza. It was obvious they wanted to see how Harvey would react now that Liza had humiliated him so thoroughly.
"Looks like those who returned from the West don't even know proper courtesy and how to apologize properly. It's natural for something like this to happen if they had never bathed in the ligh