I can understand suspicion of her not knowing he was married, but I doubt she would come forward with information that the LE could dispute - and they must have all the texts between her and CW. She said he revised his story of his relationship with his wife to her that Monday night via texts and calls. So there might very well be proof of her lack of knowledge when it comes to his marriage.
I do not find her timing suspicious, either, personally. Was she advised when to do so strategically? I believe, yes. But she is undoubtedly hounded by the press and other layperson sleuthers on a daily basis, which I imagine will ratchet up after sentencing. She needed to set the record straight. Perhaps she was about to be exposed by a tabloid and chose this time, or perhaps she is heading off the additional scrutiny to inevitably come on Monday. I think she is so far handling herself with dignity and grace and showed no signs of leaking information about her relationship with CW prior to this article that I can tell. So I do not have a problem with considering her a full fledged victim of CW unless and until there is evidence to the contrary. IMO.