Sending lots of sympathy, I'd hate to have a female rellie like that. My mum has on occasion crossed the line but I'm not shy in telling someone to back off and she does a bit sharpish, it's usually been after I've told the kids off for being naughty and she's tried to be the good guy, she needed reminding that where I told my kids off, she would have probably clattered me around the earhole for the same behavior.