PrinceSSa, I've been wondering the same thing. I keep wondering why this smart, well educated, privileged, gay, young Peruvian woman would go to an American guy's hostel room. I'm wondering if he said he had to pick up his cell, using an excuse like this father is ill and he wants to see if his mother has called, or was picking up a jacket or something, so they could go off and have breakfast? He may have even told her he had to go and pick up some cash or his credit card (lies of course), or maybe he told her he had an American T-shirt she could have.
I think there are a number of ways he could convince her to come up for " a minute" especially if he wasn't "all over her" - so she probably felt safe.