She had to have gotten there by being picked up by PvdS, there wouldn't have been another way, correct? J didn't have the car, and the K brothers were apparently back at home by that time. If N was at that house, P drove her there, that's my guess.
IMHO, The Kalpoe brothers could now be telling the truth, that they did indeed drop JvdS near the Marriott. End of story for them, except they conspired in the lighthouse story and may have knowledge/involvement with the date rape drug.
I think they're finally telling the truth too.
It will be interesting to see however who else is brought in for questioning, since Beth and Jug have both said (I think) that there are at least 7 or 8 more people who may have some knowledge of this.
Of course, maybe one of these other so far unknown to us people was involved in transporting N to the house.
Possibly a ring of perps preying on tourists with date rape drugs for after hours parties