I am getting the feeling that the C session yesterday though may not have solved anything it seems to have put you into a less frustrated frame of mind. Sometimes just talking can relieve a fraction of our stress and put us in a better place. I understand you waiting to tell your wife about the subjects of the meeting until after your older children visit. I am sure what little time you have with them you do not want it to be jaded by what is going on in other parts of your life. How old are your older children?
I feel for you on the wifes drinking situation in that it is causing you discomfort. Though I myself as being a former Drug and Alcohol C feel that if she is a alcoholic is up to a professional to decide. And that those of us on this board with little information and not knowing the extent of her drinking and habits really can only speculate and offer condolenses toward how you feel about her drinking we should not be labling her condition. There is a determining factor A person that drinks out of want is not always a alcholic A person that drinks out of need is usually a alcholic and we cannot determine if it is a need or want without clearly knowing the whole of the situation. A person that only drinks on the weekends can be more of a alcholic then a person that drinks everyday depending on the reason that they drink. I feel everyone here is only offering support but I would not take the ready made label that it supplies and stick it on your wife. I do hope your C session goes well next week and that your C pays close attention to this subject. If she feels that your fear or thoughts are valid there are things she can interject into your W C sessions with her to steer your wife in the right direction of realization without your wifes direct knowledge.
I hope that your weekend with your childen goes well. I hope your next C session goes well. I will be lurking and watching. But I have decided to refrain from replying as often on others peoples threads. As I am usually on the otherside of the fence from most I can still learn from them without inputting my thoughts.
Again these are only my thoughts and I am Wishing you luck!