ILM, so agree with you. He probably bought her cigarettes, beer, food and she attached herself to what she thought was her rising "star". Didn't she find it odd that she didn't even have a key to the MH?
The biggest thing for me is: How could Ron take her back after the weekend she had? How? Doesn't he have any self worth. Why would he want to be with a woman that did what she did that weekend?!
All my Opinion below, as I brainstorm possibilities:
*I apologize ahead of time for length or if anything is inappropriate, I don't know how else to say it or get feedback on it, other than like it is. Thank you for your input. I am not a super-active poster, so please go easy on me as I try to be more active here

Take care all...
Maybe he didn't care because it is also possible he was actually pimping her out, was he?... who says that wasn't more so the case... because at the time, that weekend, she wasn't a "woman", she was a child. What could he have done, really? He needed her services (watching kids, etc.) and was possibly using her to meet his sick fantasies, as he had many times in the past (how many children does he have where the mom was under 18?) and she was easy to keep (think how many predators have to trap their victims, and his was willingly staying with him, and watching his kids free, what more could he want, so what if she was passed around, in his mind, it may make him feel less guilty for his sick fetishes IMO). I also think he feared being charged with a sex crime.
There is a possibility that along with the drugs and stuff, comes sharing sex for debt and making money using sex (you already have it, don't have to stock it, don't have to file taxes on it and you don't have a strict schedule, it is lazy money), especially when you don't have any way to get money, they become desperate (as Misty would have been) for cash and/or to pay off drug debt. When drugs and desperation are involved, this can easily become the way of life and the more you accept, the more normal and easy it becomes to accept even more criminal, dangerous, and harmful acts.
There was also something I heard on blogtalk radio (prob. tj hart or cobra or art harris or one of them) who said there was a child prostitution ring in the area and that they (ron &co.) were connected with it in at least a few degrees of relation. I don't know if they verified this before putting it on the show, anyone know? ... So they went on to say the police may have involvement in this ring and that is why they are not going into it more, that is a hefty allegation and I wondered if it was true. Anyone know if there is a prostitution ring in that area, or a sex swap thing that this group was involved in?
If there is one, maybe ron was pimping misty out a bit. Just a thought, since he hurried up and married her. I don't think he loved her, I think he loved young girls, because she is not mature, so it wasn't like they were "close in age" based on their maturity (well, maybe they were lol), she is very immature and has no foundation or resources, so he knew he could manipulate and use her. That is messed up. Anyway, she used him back to meet her needs, but he knew what he was doing was wrong, or he would have not married her.
I also had been thinking, remember way back when the Anthony's took a visit to support Ron and Misty? With the recent events unfolding exposing George with a mistress who claims he opened up about the case (Caylee's death) being an accident gone wrong... well... could his visit actually been a support and lesson to ron on how to avoid police, and could he have actually told ron caylee's death was an accident, in the process of "bonding" and "supporting" them?
Misery loves company, it could have been a psychological way of George getting support for themselves, gone wrong.. because ron even said he didn't want their help or support because his daughter's situation was NOTHING like theirs, hum.... so does that mean he KNEW what the Anthony situation REALLY was? And if so, would that mean he was truly unaware of his situation being identical to the Anthony's situation according to police (who said according to the same blog talk guys, the police told them the cases were eerily similar)? Which would possibly leave Ron more "innocent" than I originally felt like, if he did not think the cases were similar (an accidental death), if he would have, he may not have thrown them (George and sindy) out.
Just rambling more thoughts, sorry if it is to much room taken up...

thanks