People who drink frequently may be "gray-area" drinkers

Maureen Anderson would spend hours at home alone with her baby. She said it was the isolation that led her to drink more frequently.

"It became less of an out-of-the-house special occasion party thing to more of an at the end of the day, time to have a glass of wine, shut off my brain, relax," Anderson told CBS News.

The married mother of four would soon go from a glass of wine to an entire bottle of wine. She didn't consider herself an alcoholic but a "gray-area drinker."