My brother lives with my parents. His ex girlfriend is due to have their baby this April. Since he lives with my parents the baby will be at my parents house a lot and my mom is making a nursery in the house. All nice stuff, but she’s a smoker and the whole house smells like smoke. It’s a big reason why Don’t bring my child to their house. Now this will be my niece so should I say something to my mom about the smoke issue and my concern for the baby? Or is it not my place to say anything or let my brother handle that since it’s his kid?