Oh okay. Should I just simply say “Jesus Christ is come in the flesh.” and then she should automatically repeat that exact phrase or what?

Also, thanks for your other advice.
That is correct. She should repeat verbatim. If she is unable or unwilling to repeat verbatim for whatever reason she may or may not give, - You may want to indicate to her that the spirit she is speaking with is not of God. This is real. I’ve had mormons and jehovah witnesses (especially JW’s) pack up and leave my porch or living room without saying another word.
Obviously you don’t want her to leave, so you explain to her about the cultic character of mormonism. If she denies what you are saying, return to Jesus Christ is come in the flesh, and her reluctance to say or accept its implications. Remind her of the True and Real Presence of Jesus in the Eucharist. Bring her back. Don’t allow her to take the lead, indicate to her that , “the point is moot…I’m catholic 'till death”.
Pax Domini sit semper vobiscum.
Thanks Kathy. I will check it out.
Thanks MarieVeronica. That looks helpful.
Thanks again Kathie. I will check this out as well.