Hillary had been assured (by her corrupt FBI, CIA and Dem machine minions) that she had a massive election win on lockdown and was the absolute certified winner in just a couple of weeks, no matter what. So, Trump slinging insults meant nothing to her, because she was going to squash him like a bug (she thought).

Thus, his clever digs were just petty annoyances and this whole exercise just made her giddy in anticipation. And so, none of his slings and arrows bothered her until the "It takes a village" comment where he outed her child trafficking.