I can almost believe her. There was no logical reason for her to pull out the drugs in the first place. The cop didn’t ask to search her and wasn’t going too.
The driver most likely told her to hide the drugs while he was being pulled over and then lied. This story seems more plausible. However, she could just stupid or on drugs. ;^)
It is plausable. Nonetheless, she's guilty for hanging out with dirtbag losers --a lesson that can be painful and costly.