I would not call it manipulation. It was done willingly since we are not that religious a family. Sorry for dragging an old topic, but I'm of a similar mind to Reel, but feel I need to be harsher. At best, your daughter is a "Kuffar" one that "hides", some traits are described as such here https//quran.com/2/14-20 It all depends on whether she fully understood what it meant to "convert", if she was tricked, of course she is ignorant and hold no fault. Otherwise, she'll be punished for it on death for being a liar. Your daughters "husband" (bare in mind that as she is a fake believer, the marriage isn't valid) will suffer worse for this deception against God, and if his family is aware of it too, them as well. I don't mean to be harsh, but its the honest opinion. Conversion to Islam should not be treated lightly, its a direct link and pact to God, that's not to say that I believe leaving Islam should be punished, but openly describing oneself as such but privately being a disbeliever is. They would be better off being an unmarried couple for life and ironically I wouldn't think anything bad of it. But Lying...