ya you should be really worried and by you allowing her to use coke is enableing her to continue using the drug.....coke is a very addictive drug that can really get its grips in you hardcore and cause very serious behavioral changes, if you care about your girlfriend you should help her maybee join a addicts anonymous group, bc she has already been to rehab which allows her to see she has a problem. You need to break the cycle of people she is with who are giving her the coke, addictions are not something you can control and think alright ill just do it everyonce in a while. there are no controlling addictions, addictions control you. help her out and show her that her behavior is inappropriate and harmful to her mind and health.

nothing wrong with smoking large amounts of reefer though.....tell that ho to toke up, not coke up!!!!!!!!!!!!!!!!!