Is it normal to be angry my boss told new coworker about me?

I work for a small family business. On my new coworker's second day we were talking and she said where I'd moved to and that the boss had said I'd fallen out with my mum.
I was shocked as I'd never told him this and I get on with her fine with regular phone calls. Then I remembered a few months ago I'd asked him for a reference and said I couldn't wait to move out BEFORE Christmas. I made no mention of my mum but obviously I lived with her and this was my first time moving out. He'd made that assumption but I was shocked he'd introduced me to a new coworker in this way with regards to my personal life which I'd not shared with him.
In general he is nosy and intrusive and he must know by now I say as little as possible about my personal life (I am known as "quiet"). So, when discussing where I'm from (I used to live nearer to where she lives) I was shocked he'd said this (and remembered) without asking me if it was true or how I was.