Well OF COURSE smoking should be banned just for the knocked-up moo, because don't you know, she's incubating that magical clump of cells that will morph into a golden sprog, who will one day grow up to cure cancer, find an end to all the world's ills, and will discover life on another planet.
As a matter of fact, just for her, smoking should be banned EVERYWHERE that there is a remote possibility that she could show up at.
She should have made her building a smoke free living space from the beginning (if you can even do that).