I think the laptop is the key as to motive/reason to the murder of Stephany and why she entered his room.
Both love gambling and the tables closed at 5.00 am at the casino.
They continued gambling online on Joran's laptop in his room. No sex, that would have happened shortly after they entered the room and there was no such evidence on Stephany.
Laptop was on when Joran went for coffee. If we ever see the video of that and he is wearing the same cloths, the murder had not occurred yet IMO.
Stephany got bored while waiting and started checking his personal stuff. By the time, she got to the scary stuff, he was already back and she had no time to escape. Maybe she did not believe the stuff and wanted to question him about it.
Another possibility is that he lost big time with the poker online and wanted her to cough up her credit card to finance more online gambling. She refused and he went into a rage. I do think Joran took her to his room to shake some money out of her, but not necessarily murder.
I do believe , she was murdered after he came back with coffee.
As to The Netherlands making some noises about the Peruvian treatment of Joran, well, kind of "the mouse that roared". Will have no effect of the case IMO.Just the necessary diplomatic customary BS to appease certain do-gooders in The Netherlands..