Just say this aloud "Christ does not abide in me"
If she believed 1 Cor. 15:1-4 BEFORE she began associating with the JWs then it is too late; once in Christ, always in Christ.
2 Timothy 2:13 If we believe not, yet he abideth faithful: he cannot deny himself.
To paraphrase Martha and the Vandellas "nothing they can say or do can take her away from our God... our God..."
That is the question.
Galatians 3:1 O foolish Galatians, who hath bewitched you, that ye should not obey the truth, before whose eyes Jesus Christ hath been evidently set forth, crucified among you? 3:2 This only would I learn of you, Received ye the Spirit by the works of the law, or by the hearing of faith? 3:3 Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh? 3:4 Have ye suffered so many things in vain? if it be yet in vain.
3:6 Even as Abraham believed God, and it was accounted to him for righteousness.