Found out 12 Hours ago. What now?

[LiM]

I wouldn't take down the photos; at least not yet. That might come across as petty. But if you've got a bunch of stuff sitting around the house that you don't want/need and can get a refund on, I would send it back if that's what you want to do.
Just start moving on with your life. You don't have to be ugly about it but you need to emotionally dump her and figure out how to start living a life without her in it. Let her see that you don't need her in your life and that in fact, you are better off without her. Be awesome in everything that you do.