If you really want to find out whether shes virgin or not, you
need to act upon sexual intercourse with your penis (not
fingers) in which she'll probably bleed from penetration. Only then
you'll find out whether shes virgin or not, do note if she bleeds
doesn't mean shes not a virgin it can be caused from widening of
activities such as horseriding that causes the virgina to widen and
bleeding in the past thus not bleeding when actually having sex
after. I hope my answer helped and God Bless your relationship.