There are a lot of generalizations, assumptions and plain dumbness going on in this thread.
I can not tell her what to do but if I was in her position I would tell that person way before nikkah. If the guy then decides not to go ahead with shaddi then it is also better for the girls not to marry that guy. But it is just my way of doing things because I think it would be unfair for any person guy or girl who went into a relationship with a certain assumption to know otherwise. If however, the girl herself thinks that there is no need to tell the guy about her past as she is done with it then that’s alright too.
Now to all morons who think THERE WILL BE BLOOD do yourselves some good and enroll in some upper division human physiology class. And special note to Mr. Jimmy that a young girl’s Vagina muscle are very tight and unless she has given birth, you won’t be able to know about her virginity. (Given that she is a good actress).
On a side note... a request plz refrain to use derogatory terms for women.