Sorry, was posting from my phone, so it was short and not particularly constructive. As a fellow beer enthusiast, I was rubbed the wrong way by the outcry of "quit immediately for your wife" posts, instead of preaching compromise. If she's getting pissed that he can't not get bombed every Friday night, then sure, but that's not what I heard from his description of the situation. If my wife prohibited me from cracking a beer after the end of the work week, then I'd have a huge problem with that because it's something I genuinely enjoy (and have made no secret for as long as we have known each other!)
All that being said, you definitely have to tread lightly around a pregnant wife and certainly not insist on behaving in a way that is not in line with being a good parent. Again, I'm assuming she's totally not down with you having a few beers ever, so that's where I find it to be just as much her problem...