I think the first crack in Anna's armor will come with sexual frustration (if husband refuses sex after Anna refuses BJ), Christ will be there to encourage her to do something about it, probably masturbate and this will be the first time Anna has done something sexual not with her husband during marriage. She will feel guilty but also relieved and Chris will persuade her that it's normal and this will start her opening up more.
At least this is what I am keeping my fingers crossed.
And somewhere down the future I would love to see a scene or two with Kendra taking out her crazy frustrations on Anna with a range of strapons, from small to huge, hate fuck I think is the term.