This looks to be a bad situation that will just get worse.
The girl must be having some emotional rebellion.(and apparently physical) From what you say, despite her actions, she still has a conscience to recall to her all her recent actions. It may not be long until the impact of what she done, which is completely contrary to what she says she believes, crashes down upon her.
As for you, It does not seem to be such an event for you. But be aware, that if you care for her, you are going to have to help her avoid her course of getting drunk, drugs, and sex. Her self respect seems in serious jeporady and although I do not agree with the WT cult mentality. She very well may have a spiritual need that is now been trampled on.
There is alot more to this picture.. behind the scenes... then you realize I am afraid.
just my 02 cents...