Better idea. Elly take control of her house again and lay down some take-it-or-leave-it rules.
1. Cat stays locked in her room with a litter box.2. Smoking outdoors only.3. She might help with daytime chores. I would not trust her helping with the babe at any time of day anymore.4. Contribute to food bills if she does not feed herself.5. Get the h.ell out if any of 1-4 is not acceptable.