That backstory about Tim's reason for not drinking seems unnecessarily complicated. That's the kind of story one makes when they're trying to lie about the real reason, especially when he gets so panicked when there's even a bit of alcohol in a food item.
Also, collecting corks of all things and keeping them in the kitchen, of all places? I know they're allergic to telling the truth, but come off it. At least come up with something believable.
I don't drink, but I am not THAT anal about alcohol in my food (barring those chocolates with alcohol in it. I think those things are ick). I don't like being around bars as I hate the culture and drunk people. But alot of people don't being in/around bars, even people I know who do drink.
I have alot of friends who are active members of AA. They like telling people as they are proud of their progress and I am proud of them. Part of recovery is to admit having a problem. It makes me wonder if Tim has family members who have alcohol or other substance issues and won't get help. Maybe he needs to Al-Anon to work through any issues he has to family/friends and learn how to cope with it.