You know RPP, I did consider it. There was a time, when I would have said "STBX would never do that", and of course now I have a little voice in my head that says "You never thought he would cheat and walk out either!"
But....I still really can't see him doing that. And frankly, if that much smoking was going on, all the laundry detergent in the world wouldn't be able to hide it. I'm sure the smell would cling to their skin and hair somewhat. I thought, that if he is smoking, he is probably sneaking outside occasionally.
I'm still going to keep the possibility in mind though. If they were breathing second hand smoke routinely, I agree it would merit a discussion.
And on another quick topic. I set up a Cozi calendar with STBX and was filling it out for the next few months. I sent him a message asking if he was going to take Father's Day off and which week he wanted to take with the girls (this was part of the custody agreement - we each get at least a week in the summer to take the girls on vacation if we want). He replied that he "didn't know anything about it". Apparently he didn't pay any attention to that part - even though he had to sign off on it? I know this is a recurrent theme that I see on other people's sitches, but I really don't get how nonchalant and disengaged he is about all of the details of divorce. It baffles me.