Today she says Callum will share a bottle of beer with his dad while watching football on occasion, or at barbecues.
"He's now more mature about alcohol than some of his mates. He sees it all as the same, whereas ones who didn't drink when they were younger are looking to try new drinks and get hammered.
"He has still had some normal experimentation with alcohol, as many teenagers do, but he's much more aware of alcohol because he was introduced to it early."
'Critically vulnerable'
Dr Martin Scurr, a former GP, said he used to allow his children to drink.
But he changed his mind about this "even though it means putting the brakes on ideas that, socially and culturally, have always been rather hallowed".