If you both are piecing, then she is working hard to assuage your fears just as you are trying not to let your fears control you.
It's rebuilding trust. Which is a long and difficult process.
That account with all the emails and pictures? Might not mean anything to her anymore, might even have forgotten about it, but since it is still there is a stumbling block for you; a reminder.
Asking her to get rid of it is not a bad idea, for you. Since it bothers you.
How you do that is important. Letting her know that its a problem for you that it affects you and you don't want it to but it does.
How she reacts is just as important.
You are either going to accept that it is there and she doesn't use it, or if you are unable to do that, you are going to have to talk to her about it. The third option, getting rid of the stuff yourself, I do not recommend. It doesn't show piecing or working together, it shows you imposing your will and desire.
If she does it, willingly? I belive Sandi would agree that is a very good sign toward piecing.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK