Allowing her to vent is one thing ... standing there while she dishes out blame and abuse is another.
Again ... thats all on her right? She could come back happy, angry, with a Mike Tyson Tattoo on her face ... none of that matters, what would be better is if YOU focus for that 30 days as a chance to rediscover yourself.
My wife too could not go hours without contact ... then enter OM and all those feelings and shared moments transferred to him, just like moving money from one account to another. NOTHING I could do about it really, but the withdrawls were tough for ME... something I had to deal with. Might be something for you to think about and brace for ... resist the urge to contact her, live YOUR life .. look at it as a vacation from all this mess and you can recharge your life-battery.