Just start smoking infront of her (not cigar, but it should be something like cigar, which should not be injurious to your health). Gradually she will understand that if she won't leave smoking, you will also become habitual to it. So, she may try to give up smoking. Not sure, but worth a try. I tried it with my father who had a habit of chewing tobacco. I started chewing some other thing, and he had to give up chewing tobacco, for my sake.