I wouldnt really say it is a secret! Its not like, well all that unexpected is it! She runs of for what, a year, no contact to her husband. I doubt she would come back wanting everything to be fine!
Oh, i thought it was gonna be something gripping, like that her new partner is a woman! Or that she is up the duff again! Ivknown for ages she asks for a divorce so didnt think that was such a shock!!!!