The answer you are looking for is around 10% of teenage youths drove under the influence.
Pulmonary circulation only occurs between the heart and the lungs. ... Systemic circulation occurs between the heart and the entire body.
She should do her best to sit him down alone, and see how he is feeling.
She needs to have a discussion with him, not an argument. If he is going through something, alcohol may just be an outlet.
The best thing is to make sure he's okay, and for her to lovingly express her concerns. =)
