Same here. Then I dated her. For 10 damn years.
She was still a bully.
She ended up telling me later how she really felt. I'd actually asked for it all by bullying her the whole time. I was always doing something that triggered her bullying and was still at it.
Got me emotionally bound to her son and then started teaching him to bully me too.
She just thought she was supposed to apologize as part of her social mask. Was all about her and the image she was producing.