I so agree with all this and never thought about her taking the pics of herself so that would be found by another woman but holy crap that would be something she would do IMO.
I believe he thought she was gone when she appeared in the bathroom with the camera. I feel she packed up, loaded her car, grabbed the gun from her car, a knife from the kitchen and went back upstairs to kill him and she wanted pics of the fear in his eyes once he realized ( in her mind ) that she won.
All the pictures were deleted from the camera, so I don't think they were "trophies." Nor intended for somene else to see. That whole issue confuses me.
I also think she had every intention of paying him back for the Gold-Digger blog and axe murderer comment and was going to kill him if she couldn't use sex to talk him into taking her to Cancun. How exactly the pics came into play, I have no idea.