Her choice of leaving islam and entering Christianity shouldn’t make us angry we should pity her because if she dies as gaal her eternal home is hell.
u shouldnt say who will go to hell and who will not. That is Allaah swt call. She might go to paradise before ALL of us. Who knows maybe she could find the light and revert to Islam in old age and go to Janaah!
Or she could go to paradise by any reason, Only Allaah swt is the decider