I think there's more truth than rumor to this story. The time Charlene spent in Switzerland may not have been only for rehabilitation, but for both spouses to work on a contract.
I agree Charlene's goal is to stay in her children's lives and also to keep Nicole Costa at bay. It is such a sad marriage, it's a marriage that "should never have happened" but there are two lovely children out of it, that each parent loves very much.
I've wondered why we haven't heard anything concerning the Brazilian woman and her paternity claim against Albert, if it was quietly settled, now I know. This claim was, I believe, the final straw for Charlene, it's sad.