Buy her a beer and talk about old times.
Research involving more than 7,000 older women found that those who drink a moderate amount of alcohol have slightly higher levels of mental function than non-drinkers, particularly in verbal abilities . . .
understanding whether alcohol affects specific areas of cognition may shed light on the mechanisms that make it protective. Possible mechanisms include that alcohol increases levels of "good" cholesterol and lowers the risk of stroke, that it may decrease the formation of plaque that is associated with Alzheimer's disease and that it may increase the release of brain chemicals that affect learning and memory. . .
"Until we better understand the reasons why alcohol consumption is associated with better cognitive functioning, these results on their own are not a reason for people who don't drink to start or for those who drink to increase their intake."
Ok, don't buy her a beer if she doesn't drink or is already stoned.