I will chime in and offer my opinion which of course is just that and could be completely wrong. So with that disclaimer said here's what I think.
If you have issues with standing up for yourself, both the grooming and the comment about the near accident look like attempts by her for you to assert yourself with a reaction. Both are blatantly bad things for her to do and she wants to see what it will take for you to speak up. You say you have seen her for a while and she is very competent. Its very possible she is trying something new with you. Competent therapist in my opinion seek out ways of helping their clients. Be it always staying on top of the latest articles, journals and research etc. Its also possible she asked, or was informed of a similar case by another therapist ways to deal with your particular issues.

peace.