First of all if you were brave enough to share a trigger with you, and she blew it off, you need to pay attention. This is NOT doing the work of R. She should be doing anything and everything in the world to help you heal. If that means throwing away old frames that he gave you then do it. If she doesn't support you, then tell her you don't care if she thinks they are "just frames" and that you deserve more respect than that.
Personally I would take those suckers down and burn them. I burned a lot of stuff in R. It was cathartic and helped me heal. My H had a coffee mug of a certain place that OW loved, and went to. I was almost a year out, when I stumbled upon it in the basement. Know what I did? I called H and said hey I just found a coffee mug that the homewrecker gave you. Do you want me to wait till you get home to destroy or go ahead and do it now? That time he chose to participate with me, we took that sucker to the driveway, and we used a 15 pound sledge on it, til it was dust. It was awesome. That's what a WS does to help their BS heal.
Triggers are hard and sometimes the weirdest things will cause it. A lot of dealing with them and getting rid of them has to do with removing the emotion from it. When something makes you trigger try to figure out the why of it. Because it reminds you of who she was when she had the A? Because it scares you? If you can understand the feelings behind it it gives you a direction in how to handle it. Mementos like the frames though that shit has to go.
Behaviors from your wife, those have to be talked through, and figure out a way stop it, or change it.
This giving a book that was for you two, to someone else, when she acted like no biggie did you clam up, or did you say hey wait a minute. That book has very special meaning to me, and I want to keep it. Please don't share it.
Like my H told me often in R, because I like to keep the peace, if I don't speak up, then he can't possible know what I am thinking. He isn't a mind reader and neither is your wife, if you express your feelings, and she disregards them, then you have to push the issue, if she still doesn't get it, then maybe she doesn't really get any of it.
It's easy to plug along in day to day life, and pretend this stuff never happened, but when the triggers come, and they will, for a long time, how you both react and deal with them will tell you who she is.