Hey there, i have no experience with alcohol addiction only coke. But they both are a disease/addiction.
Regarding your 1st question id say no your not being unreasonable, children always come 1st no matter what.
There is no doubt about it she is an alcholic. She would not hide it if she did not have a problem with it.
Everyone is allowed a glass of wine or beer after work.. but 2 bottles sometimes.. seems a lot.
Does she drink in the day? Or do you not know?
My opinion is she needs to knock it on the head, and seek help straight away. Theres so much help for alcoholism online and doctors . Plus its only going to get worse, and everyone knows how easy it is to get alcohol.
Then you have the health factor. Its such a long and slow killer, watcing your partner slowly kill them self.
I would keep making aware what shes doing. How it effects you and the baby, and does she really want to risk losing everything. There are lots of AA meetings she could try.
But 1st of all she needs to admit she has a problem. Start by cutting down. And if its genetic and how its effected her, should she really drink again?
Hope this helps.