whats gonna happen when he requests that she not sleep with other men? 


Look at some of you, not seeing the problem for what it is. He asked her to do something simple that she could have easily acquiesed on. Instead, she choose to defiantly refuse his request and angerly wear something completely opposite. Do you guys think her antics are going to stop after they got married? Do you think her telling him not to tell her what to do will end after they leave the altar?
She exposed her true character and feelings towards him. She does not respect him one bit, because if she did she would have at least asked him why he desired her to wear the nice dress. No, she immediately went into anger mode, reacting angrily to a request for her to do something. Some of you need to learn how to see red flags upfront and avoid them, because her actions were definitely massive red flags on how their marriage will be.
AyoNow his fiancé look like she in a tag team with Mick Foley

First, let's start with you calling her a bytch. Why did you feel the need to do that, while also attempting to defend her?Of course you see a red flag, you don't know this bytch. This isn't some stranger he picked up the day before. We have zero context here, other than he told her to dress a certain way. He was aware she wasn't wearing a dress when he got on a knee, when they arrived at the spot, when he say her dress that day. So I'm positive he knew what her reaction would be after telling her to wear a dress.
Also, in what world does ordering your gf to wear certain clothes work on a consistent basis?
I learned at a young age to say out of peoples relationships, especially marriages, because you’ll always be on the outside looking. And the best part is, you don't have the marry/date the person who's triggering you. This is a non-issue.