LW2 is oblivious to how she was at fault -- her large dog slipped its leash and leapt on someone, who didn't like that. As a dog owner, LW2 is responsible for the dog, even if it is still a puppy and poorly trained.

Extrapolating that a person who didn't tolerate poor behavior from a dog would be mean to kids is a pretty far reach; wanting an apology for exiting the situation is ridiculous.