It is no part of a lawyers job to come up with a false defence for his / her client and no ethical lawyer (and most are, no matter what you seem to believe) would ever do so.
If you can’t believe the lawyer’s ethics, believe their common sense - they’d be trusting their career and possibly their freedom (if prosecuted for some sort of perverting the course of justice / perjury offence) to their client not spilling the beans about their lawyer coming up with their defence.
To be honest, the sort of client who thinks his / her lawyer is there to conspire with him to get away with his offending is pretty much a joke in the legal profession. No serious criminal wants this sort of lawyer - the view among the criminal fraternity tends to be that if they’d conspire with you, they’d conspire against you. Most want an honest lawyer who is given the ‘official’ version of events.
Apart from anything else, in this case she will have been told by the person who gave her the drugs what to say if caught (the ‘boyfriend made me do it’ and the ‘pregnant’ stories in the Georgia case which may or may not be true) while being reassured (falsely) that these stories will mean she will be released with a slap on the wrist. She doesn’t need to wait for the lawyer to come up with these things, that’s already been sorted well in advance.