When I thought she might have taken "pics of pics" I thought maybe she had some kind of plans for MiMi or others and those pictures being in his camera, then her plans changed (and they got deleted & TA is no longer with us).
The pictures just make no sense no matter how you want to look at them.
Even if she thought they could be deleted once done with the killing, why take a chance and take pictures AT ALL?
You have no idea if your plan is going to work, if you will have time after committing the act to get out clean.
Why take even a minute chance on photographic evidence existing?
Again, who the heck knows. Trying to get in her head is like trying to find the meaning of life....not going to happen while on this earth!
The problem with the Mimi theory is that JA took a gun. She premeditated no one knowing she'd be there. And her hair is not the color in those pictures that we've known it to be throughout her relationship with Travis. So the plan of Mimi finding these pictures on the camera while in cancun but changing to murder goes against all the premeditation for the murder.
As for her taking the sex pictures on that day, she apparently thought deleting them was enough. It wasn't. That's why she became so worried about her other camera during interrogation. She thought they'd find whatever she might have deleted off there. But, to her luck, she'd apparently taken other pictures with it. ALOT of wedding pictures, and I'm guessing that pushed the deleted June 4th stuff off the camera.
My theory for her taking the sex pictures and shower pictures that day is that she'd planned to creep into the house, kill him and keep rolling to Utah in the middle of the night. Zach or Enrique was home and so she didn't think she should risk trying to kill Travis with another man in the house.
So she had to wait till the roommate left, and after all the driving, I'm assuming she slept past the time that the roommate left, and Travis was now wide awake, so she had to do something to lower his defenses and get him into a position that she could murder him.
Travis was all about cleaning his floors, so she talked him into doing the sex pictures they'd talked about so much to get him into a vulnerable position. I might even theorize that she attempted to tie him up, but he didn't want to be tied up--so that didn't work.
After sex, he was back to business as usual and probably wanting her to leave. So she concocted the shower pictures idea and talked him into that--or she walked up there and just started taking pictures when he first got in the shower, and he went along with it.
I believe the pictures were just her MO to get him to the point where she could kill him. I also kind of believe what she said on the stand. Nurmi asked her why she'd have sex with Travis. Her reply, "Well, I'm not gonna go there and not do that...."
It's possible that your theory could be so and she planned to plant the pictures on the camera while he slept, but if he awakened and they argued, she'd brought the weapons to kill him. I just find that extreme, though, because planting the pictures meant that she wanted him to be around to reap the consequences.
I also think she really thought deleting them would be the end of it. Let's face it. She was a novice photographer. Who knows if she knew the police could retrieve photos after she'd deleted them, bleached them, and ran them through water.
Common sense should have told her to take the chip, wipe down the camera and put it back in the case and then put it in the closet. I would say common sense should have told her to bring a chip, but I am not sure that the pictures were a part of the plan until plan A was interrupted by the roommate.
These are all theories. I'm not married to any of them. I do like the theory that she planted the pictures for Mimi to "accidentally" see, but she could have accomplished that with an email, and her hair was also a different color than in all the pictures she'd ever taken with Travis. That piece of evidence alone contradicts these photos being taken earlier.