I think she is a s3x addict... Or nympho as we would say... She probably gets these uncontrollable urges to fu*k all the time... Like Christina Ricci on Black Snake Moan... Some people actually suffer from those afflictions...
Could be s3x addiction, but in the moment, you don't know. In the moment, if a woman is raping you at knife point, you gotta wonder what's up with this situation. s3x addicts can just, you know, call a friend and say they wanna bang, especially a female s3x addict. This is more than that.