According to
http://www.aboutdivorce.org/ok/annulment.html
You can possibly get an annulment based on Fraud
"Fraud is a legal annulment ground in Oklahoma. You can get annulment in Oklahoma if your spouse obtained your consent for marriage by fraud or by misrepresenting him or herself."
If she will admit to the Court that she lied to you then you do have a valid (IMO) case.

