ok lets skip the whole quiting smoking thing,cause thats something she will onku succeed at WHEN SHE IS READY TO QUIT.
like the others said,she worked out for the last two years.so that might be something you will just have to learn to deal with.
now on the subject of "having more children"
in my opinion,like i said my opinion.
if she would like children of her own,and you said you were done having children of your own.
i think it would be selfish on your part to not let her have kids of her own.
but if you dont want anymore,it would be selfish of her to make you have them with her.
im not gonna say that you two need to split up.
i think you just need to sit down and do some real soul searching and figure out just exactly what you want from life at this point on.
if you cant see your life as happy without her,well then you may need to make some concessions and find that happy mid ground where the two of
you can be happy together.
who knows maybe you two will come to an agreement where you two end up happily married,with maybe just one more child (from the two of you)
and a non smoking wife.
lets face in this day and age every woman thats pregnant knows that smoking is very very very bad for the unborn baby
see thats the thing about a well worked out relaitionship
you give a little to get a little in return.
jm2cw
good luck