Is It wrong for me to take her virginity

how could you be hert first if she cheated on you?

she can't have cheated and STILL be a virgin

vinginity means puruty and chastity

cheating means having sex. what you suggest is a contradiction.

however much or little she may have done with the other person, there is still that contradiction.

if she cheated she is not pure
if she is still pure, then she could not have cheated