I will pray for your friend and her family. I had a store manager who was and Independent Fundamentalist Baptist. They have all kinds of strange ideas about Catholicism and all of them negative.
One day in the break reading my Bible and he came by and ask what version it was. When he found out it was a Catholic Bible he thought I was ripe for the picking. Well unlike other Catholics he’d met I was well versed in apologetics.
We debated for years and years sometimes heated but always maintained our friendship. He kept me on my toes, I spent hours researching on the web, reading my Bible and used a lot of ink printing out a lot of things for him to read in the end I dispelled many of the notions he held about Catholicism.
I remember when then movie The Passion came out and he went it saw it. He approached me about it after ward and said he was rather surprised since Mel Gibson was a Catholic that the movie didn’t have a more Catholic slant. I laughed and said “What did you expect the Pope walking by praying the rosary?” He said well I thought it would just have a more Catholic interpretation.
I said there is only the biblical version of Christ’s passion and that
is the Catholic version.
You may want to open a separate the thread in the apologetic forum because the prayer request is forum isn’t supposed to be used for advice. I will say they know their bible verses, memorization is very big in their churches. They also don’t believe they are protestants and they’ve been around since the time of Christ. My manager gave me the print out about “The Trail of Blood” which is supposed to trace their church back to Christ’s time. A couple nights scoping out the internet and I was able to refute it. If they question you on something and you don’t know the answer be honest and say “you know that’s something I haven’t studied in depth but I’ll find out and get back with you.”
I’ll check to see if I have any of my stuff still saved on my computer and PM you.
It’s funny the last couple years we actually found ourselves on the same side debating with with our very secular co-workers. He told me he’s learned a lot of about Catholicism from me.

Right now he’s at another store but we talk every once in a while. We’ve been friends for 15 years.
God Bless.