We are being setup by the producers
I have a hard time believing all the chemistry Jack and Marissa had just disappeared. I think they needed to cool things off for the sake of the show and in the final episode, she will show her true colors again and Nat is gone.
I just don't see Jack and Nat together. Sure, opposites attract, but I don't see it in this case.
Did anyone else find it strange that Jack seemed so chilly about/to Marissa all night, but ended up picking her to continue? I smell a rat.
Did anyone catch the foreshadowing at the beginning of the show? Jack was talking about how one of these girls could be his lifelong mate and the producers cut very briefly to a shot of Jack and someone riding closely together.
All I can say is, watch out Jack because Maria is coming to kick your A$$ if my hunch is correct!