I have to admit that I've given up on trying to figure out what happened on June 4. There is just no way of knowing, IMO, unless and until we have access to more information--probably years and years from now, after her appeals are exhausted.
All I feel I "know" is that Travis wasn't expecting her, that she didn't sneak into his house until after he had gone to sleep, and that there is no way she slept in his bed that night, so even if they did have sex, if the timestamps are correct (and I don't think they are), all the hours before 1:00-1:30ish PM are unaccounted for, same thing for between 1:47 and 5:20.
I don't believe he knew she was ( still ) in the house when he took a shower, I think she ambushed him there (the second time that day), and I think he turned towards her in the shower because she had pulled a gun on him. I think she used the gun as a prop to recreate (mock him) with his almost -died fear story, and that she likely threw the gun on the ground knowing he'd lunge for it, and she pulled out the knife as he did so.
I think she took a great deal of time cleaning up and staging the scene, and that she couldn't resist (beforehand or afterwards) going through all his texts (deleting many), searching through his papers and journals, and rifling through his wallet, helping herself to his cash.
I think she was still there when Zach returned at 3, was caught off guard, retreated to TA's office, closed the door, and that's it's likely she was responsible for the afternoon's computer activity, whenever and whatever it was.
Obviously JMO, but until and unless proven otherwise, I'm convinced Travis was courageous enough to insist upon truth, and that at a very steep personal cost (not referring to his murder), he did see her for who she was on May 26th, and that he was done with her.
Because I am so sure for myself that is so, I find it painful to keep trying to imagine what happened that day, because what I keep returning to is a haunting realization of how terrified he must have been when he first saw her, and how afraid throughout. Because of that feeling, I hope in one way he never saw her until she surprised him in the shower, because at least then he would have been spared hours of psychological torment.
Did they have sex that day? Dunno, and frankly, for me it isn't a decisive question. If they did, IMO it was coerced in the sense he was acting on survival instincts, doing whatever he had to do to appease her in order to stay alive. Travis of all people knew what her response was to even perceived slights, much less flat out rejection- he wouldn't have chanced it in that situation. He was a survivor of severe child abuse, and he was a DV victim.
He wanted to live.