Bettina is nervous around Brad, she even said it last night that she really likes him and is finding it hard to cope because she never came in to this thinging she would have feelings for someone and that she was worried about the divorce factor. She also talk about the chemistry how strong it is. To me she is almost like how Trista was with Ryan childlike. She did not know if she was even going to get a rose and she said that she would be so said and she did look sad.
One other thing when Bettina went on the water bike with him he was rubbing her leg and her hands. She does have a sense of humor though and is showing it in her PI's