I would have said it might depend on her reaction to it being found, but as faked 'collapse' would suggest she is obviously the manipulative and unreasonable type I'd just call -or say I'd call- the police. Then watch them scarper with the very faint hope it might teach them a lesson. If they leave you with the drugs them drop them off with the police to dispose of. Of course, the above idea might go out the window if her friends look dangerous and possibly armed...