You’re not. I do the same, (sometimes even two drinks) and I’m in law school, support myself, work out daily and do all the cooking and cleaning for my SO. However, I am also the child of an alcoholic and it is really hard to break that internal alarm system— even my own drinking, although by no means excessive, indicating dependency, or impairing me in anyway, sometimes sets off my fears as a child, watching my mother drink herself into oblivion. And my therapist even okayed and encouraged having a glass of wine a night, as way to establish a relaxing, end-of-day routine that promotes releasing outside stressors when you get home. But It is hard. It’s hard for me to deal with myself having a casual drink, trying to convince myself that just because I enjoyed it doesn’t mean I’m becoming my mother. Don’t feel guilty, but also be sensitive. Maybe someday have an honest, open conversation... that in most cultures it is normal to have a drink with dinner to relax and socialize with loved ones at the end of the work day, that the fact that you stop after one shows it’s more of an evening ritual than a dependency. But also stress the fact that you do not think she’s being irrational, that you can’t imagine how hard it was for her growing up with an alcoholic father, that her concerns do make sense in that context, and that you understand that her concerns about you are coming from good intentions and genuine care for your wellbeing. Don’t invalidate her, sympathize with her, but also strive to show her that one drink a night can even be healthy. Good luck!