I had a senior position at a CPA firm. There was a new employee who, immediately after she’d been hired, started behaving very oddly and inappropriately.
When she was maybe a week into her job, she and I were in a planning/management meeting. She sat across the table from me. Every time I said anything, this woman would grin from ear-to-ear, giggle uncontrollably, and say, “You’re adorable! You’re just adorable!!” I wasn’t saying anything witty or funny; I was discussing some mundane business matters.
The first time she did this, I stared at her for a few seconds, with a look of combined surprise and annoyance, and said nothing. After that, I completely ignored her. When she failed to get any reactions from me, she started grabbing the arm of the guy next to her, shaking him, and asking, “Isn’t she adorable?”
That was typical of her behavior at work; she soon offended everyone. She was also an idiot who couldn’t do her job. She was fired shortly after; I’ve never been so glad to watch a colleague get the boot.