It's heavily implied that Grace is rejected by Mr. Le Bail for two reasons: 1) Because her motive for marrying Alex was indeed love and not just money, Grace's soul would be more difficult to attain; it's also mentioned that both Charity and Fitch had no issue selling their souls in exchange for the material whereas Grace longed for a family. And 2) Helene draws comparison between herself and Alex - both resisting their destiny by trying to leave the family only for Mr. Le Bail to reject their spouses, forcing them to stay. Mr. Le Bail may have sensed that Grace's innocence and purity would lure Alex away from continuing the tradition and disown the family.

Film

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