It's not you. She has an abundance of ego, that's for sure. It almost seems like Rob and Erin has some kind of a history together before the show started or maybe a prearranged arrangement. They showed clips at the end of last night's show, and when Erin said she remembered what it was like standing up there as one of the two remaining girls, she was looking at Rob with anger as if to say, "Well, aren't you going to pick me?" not lovesick in the least. Maybe Erin was just playing Rob at that point, but it just leads me to believe they have something going in the backstory of the show. Then they show Rob returning to the show, and Erin didn't seem the least bit surprised. What's up with that? Granted Erin has a monotone personality, but her reactions all throughout the shows have been very subdued. The only thing she really gets excited about is the money.... and she comes from money! You'd think she'd find more novelty in one of her party favors (the men of the show). The men seem to be reacting just as the women did, and it will probably be extremely difficult for Erin to walk away with the guy AND the money in the end. I don't think these guys would show dissappointment in having Erin as a choice even if they could (on TV anyway).
I wonder if Rob was sent back to squeal on Erin and her past or given the option to do different things to change the outcome of the show? On the other hand, why would he subject himself to further rejection? There's probably going to be at least one more twist after this one, like Erin and her man have to stay together for at least one year to get the full annuity.
Maybe he'll be able to offer her the money and the guy if she chooses him as the guy.... we'll see.
I don't know why some of the posters on this site feel sorry for NBC and the cost of production - they rake in the money with every episode and recouped their costs with the airing of just one or two commercials during the show.