Babysitting her so she can drink safely IS enabling. If she is an alcoholic (which is our working assumption), she CANNOT drink safely. She has to experience her own consequences of those actions. The one exception is when other people's safety is at risk. In that case--if she tries to drive drunk, or to drive again with her child in the car--I would call the police and let them stop her. Apart from that, her drinking is her business, but I sure wouldn't be keeping her company, or keeping her supplied.
And for meals, pick a different beverage. Ice water is very healthy and goes with ANY meal.