I think that Camille is being on her best behavior, because she is going through a custody battle with her ex-husband. I'm sure she doesn't want to give him amunition to fight her with.
Kim has a right to be happy and to make her own decisions, however, I had a friend once who reminds me of Kim and I can relate to Kyle's position. Even according to Kim, she has made some poor choices and caused herself a good amount of grief. You try to help people out of the mess, clean it up and pray they learn from the lesson, but the next thing you know, there they go again. My friend never met a leech she didn't like. She would hook up with the guy and refuse to listen to reason. Soon my friend was back into drugs, allowing the bum to sell all her valuables for his drug money and she worked to support him. HE also liked to slap her around. Did I mention he had a criminal record a mile long. My friend said she didn't care. He made her happy and that is all that mattered. I had to cut her off. Eventually, he almost killed her and destroyed her car. So, I know what it's like to be protective of a grown woman who is clueless with their safety and welfare.
So, if Kyle had heard from people in the community that this guy was an abuser, partier, won't work, etc. then I would be skeptical too. I'm not saying that Ken is anything, but a nice man. I know nothing about him, but I'm sure his family and friends have an opinion and perhaps Kyle has picked up on it.