A lot of damage can happen in a year. I personally couldn't wait that long, but others have made it. Most men can only give it 3-6 months before losing not only their own emotional health, but their wife's attraction for them as well (since she knows that YOU know, if you remain too long without filing, there is real risk that your passivity can be an attraction-killer to her).
But everyone's situation is different. I just want you to consider what each subsequent month of her going in this direction might do to her -- and your family. It has to be balanced against the ALSO very real damage that DIVORCE can do to a family.