No surprise to hear Trista talking about trying to get pregnant. Even when she proposed on her Bachelorette, didn't she tell Ryan that she wanted to make babies! And, we all know that so many couples experience infertility. To be honest. Trista is so very thin, I have seen shots of her that almost look anorexic. (not saying she is...) But, perhaps being as thin as she is is contributing to the difficulty. I have always heard that very thin or athletic girls can be affected this way.
About Moana and the other girls. Yes, I think that the dynamic with a group of girls has a LOT to do with it!!! Moana frequently was off to herself, and did not participate in the girls pajama-party antics. And, I think it all went on from there. This has been the case several times before, where one girl would be like "I am here for the guy, or the show, and not to make friends with a dozen other girls" and this is the one who is instantly villainized.
Other than taking her shot at hogging some time with Travis, I don't think I have seen any other specific things that she has said or done.
I do not think that Moana is crazy... But, issues... definitely!!!! One second she will be one way, and then the complete opposit the next. Not just on her change of heart about Travis either. She does have issues, and is what I might call unstable??? However, on her best of times, I think that Moana is a REMARKABLE girl!!!! From some personal experience with somebody that I know very well, I can see how her self-serving overbearing judgmental Dad has contributed to her issues. I think if she could leave that behind, she could go far!