I have always believed Tom has something on Nicole, namely the identity of the real father of the baby she miscarried, which I believe is the real cause of his abruptly leaving and divorcing her ("Nic knows what she did") He knows he's sterile and the child wasn't his.
Now however, it may be worth it to Nicole for that secret to come out as the price of getting the children away from him and the cult. As far as Tom and Co$ have fallen in public esteem, no one will blame her at all for cheating on him.
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