Sqad, i cannot believe that you are unable to differentiate between a fantasy enactment between two consenting adults who are already intimate, and a robbery-with-violence assault, which is what rape is.
Rape is not about sex, it's about power and control. The notion of a woman having a fantasy about taken forcefully in a safe environment with a man she trusts is a long long way away from a woman being forced into sex of any description against her will and consent.
For the benefit of the increasing numbers of uneasy correspondents on this thread, why not clear up any misconceptions and confirm that you do understand the difference between the two sets of circumstances, and that what took place between you and your girlfriend was clearly a universe away from the act of rape - regardless of what she may have said at the time.