I've never been to rehab, but I was in a 6 day detox facility. They had a family meeting, too. It was meant to be a time for everyone to be able to say what they were feeling, had felt, and were concerned about regarding their alcoholic. I would suggest you do just that. If you have things you want to say, then say them in an environment where no one can explode or get up and walk away. This is the time to say what you have to say and it's really only fair that you do, so everyone can be on the same page.