I think people need to start learning how to say no to their relatives! lol I know, maybe easier said than done.
But seriously it's probably better to offer to just provide a relatively small number of edited photos (and if you end up with extras that's fine) and be as clear as possible up front you don't have the experience or whatever doing this type event photography. I think people sometimes have unrealistic expectations so it can be better to be specific about what you'll be able to do (like taking a few pictures of her with the vising group) and explain why it would be better for her to take the kind of pictures she wants for her blog.
I don't know what she expected, I can see some issues with exposure and framing but some seem to just need some adjusting, cropping etc. and seem to be usable for a blog. You can't help how you feel and I probably would have felt insulted even though in her mind maybe giving you the books was well intended.
I don't know if it would be worth your time at this point to maybe offer her a few edited photos of herself or just chalk it up to experience and don't worry about it.