Have you ever heard of the 'pink cloud?' It sounds to me like that is where your GF is at right now. It wears off. Recovery from alcoholism takes time.
My opinion? Six months to a year is a 'safer' amount of time to see if recovery will stick. Ultimately, though, people can relapse any time. Even years or decades later.
When making decisions that affect lives, I find it better to take my time. There is no hurry. If a relationship is meant to be, then it will be. Imagine how devastating it would be to rush things, only to find out that it was too soon. That would be much harder on a child than waiting a little while, wouldn't it?
L