I totally had the same question as PPs when reading the latest email, "Is this really how Amber writes?"
I may have watched too many Datelines or Cold Case Files and my imagination may be running away with me, but I too wonder if she really sent that email, given her behavior toward you. What could she possibly have to say?
Her reference to "our place" makes it sound like she's living with him. So this probably isn't a case of her 'seeing the light' and asking for your advice on how to disengage from him. Also, it's not like you dated the guy. Your experience with him only extends to internet correspondence and stories from others, so I don't really know what else she might think you could tell her that you haven't already.
You aren't friends and have never socialized outside of volunteering before, so wanting to meet up with you now
to chat seems really strange.
If I were going to say anything
to her, it might be this:
I think I'd respond back with a "Nice to hear from you. Been really busy. Is it urgent? Are you planning to volunteer any future Saturdays? Maybe we could chat then."
I would want to have an idea what she wanted to talk about that required a face to face meeting and couldn't be said over sorting clothes on Saturday before I agreed to see her. I would definitely NOT go to "our place" or your place, only neutral, heavily populated territory, as PPs advised.
But if you'd rather ignore the email I don't think that would be rude. If she really needs to speak with you in person she knows where to find you.