I am of the belief Arias was attempting to frame Travis by putting salacious or pedophilia photos on his computer but couldn't access it. I believe she was an uninvited guest at Travis' house that day.
In fact I'll go this far, I don't think Travis took those nude photos of Arias. Why? He wasn't the type to 'get off' on watching




and he certainly wasn't liking Arias at that time. Not after that text message of his.
That whole bed scene (I believe) was a set up. I don't think they had sex. I believe Arias had the gun pointed at him as he awoke. I believe the first time Travis saw her was around 1-2PM. Not 4AM. Because I don't believe he would agree to sleep with her. There is no way I can believe he knew she was coming over. As for her knowing what was on his computer at that time? Well....she was probably peering in the window and saw what he was watching. She's a cunning, sneaky, conniving, contriving, calculating sloth who didn't or couldn't take a hint.
She was going to set him up then kill him. It's that cut and dry. IMO of course.