I'm sorry for her and for you and your ignorance in believing that humans need to go around proselyting to each other about a fictional horrid deity who cares less about human life than causing men to murder each other in the name of religious nut-jobbery.
I hope your family member never succeeds in this horrible exercise of human vanity and terror. Missionaries are equivalent to walking dog excrement and that's exactly how I perceive them. I hope this person gets very ill and never gets to complete their so-called mission - a mission of perversion if ever there was one.