There doesn't have to be drama. Just give her a nice response about where the kids are sleeping. I wish my H showed a consistent, parental interest in my children. Instead I just see the stabs of interest when he is presumably bored or lonely.
I think this board probably exists because none of us are trustworthy. Voicing it here is better than voicing it to her. Life goes on my friend. With or without her. Get out of bed and make it a productive and happy time with your kids. They are the real victims here, not you. Give them the luxury of the best childhood they can have while having to survive a home with parents who are not always able to act like parents.