Im due to move in with my partner over the easter hols. In preparation I've started moving a few non-essentials over there, such as my "art stuff" and a collection of art work I have done over the years, mainly when I was a teenager. We put it all in a cupboard in his kitchen.
I was over there yesterday and DPs son was there and he started off by saying he loved some of the comic stuff I drew when I was younger. I thanked him and said he was free to use any of my art stuff as I rarely get the time anymore. He then said "oh, you should have heard my mother on wednesday, she came over and she was critising everything you'd done, she's like that sometimes, it annoys me". So I was like 
"how did she see my stuff? it's all away in the cupboard" so he said "oh dad had mentioned that you'd brought some stuff and she asked to look at it and then just spent ages going through your drawings and saying how unprofessional they were". So I was already angry at this point, not because of what she'd said (of course they were unprofessional, I was 16!) but at the fact that DP had let her rummage through my personal things.
So I got DP alone and asked what had happened and he put on an un-genuine disproved face and said "oh yeah she was going through all your art stuff and criticising it". I said "well why the hell did you allow her to do that?? and didn't you defend me in anyway or were you ok with her slagging me off to you like that" and he looked uncomfortable and said "well I didn't think it was worth an argument".
I now have visions of the two of them sat there criticising my stuff together with poor DSS looking on disapprovingly.
Am I over-reacting?? can't believe he let her go through my private stuff!