She is a Rocky/Kentucky mountain, but is showing the bad side of their temperament. I think due to the fact the person who owns her is a beginner and trying to learn online this mare is running the show. She is very spooky, very forward and in your space which tells me that she will be a handful on trails until you get her desensitized, but which you won't be able to work with at all until the foal is weaned which would be sometime in late July, early August.
My biggest fear is we will have to end up putting training into a 15 year old horse that should know better.
The more I discuss it the more I think she should be a pass and someone elses problem.
A woman can NEVER have too many horses.....