My male character just turned 21 years old. Two years ago, he was released from rehab for his heroin addiction. The night he turns twenty-one, his friends give him a six pack of beer, but he only takes one sip as a celebratory act. He drinks no more after that. I get a message from a reader saying that he shouldn't have drank the beer and that drinking beer after rehab is a bad choice because it fuels the addiction no matter what drug of choice the addict had.
Now I'm worrying. Should I change the scene entirely or would that one sip of alcohol make that much of an impact on him?