YANBU at all. They are your babies, it's your choice. Cant believe all the people on here that want you to pander to such a dirty habbit.
Sounds harsh but I say this as an ex smoker. I quit, cold turkey, 7 years ago after about 20 years of smoking. Took me 6 months before I could finally say I was a non-smoker and it was difficult, but good things always are.
My DD was only 4 weeks premature, never needed any help and after a week on the ward was allowed home.
No smokers get near her. No way do i want my baby stinking of fags!! Plus health officials are currently investigating the dangers of 3rd hand pasdive smoking so you are right to be cautious.
MIL is the only smoker in the family and DD has never been in her house, it stinks! The air is so thick with smoke you choke taking a breathe!
3 times we took DD to visit and stood at the back door refusing her please to come in. Despite knowing our feelings on it she actually sparked at fag, at the back door, right next to the pram! That was the last time MIL saw her. DD is 7 months old now.
Won't invite MIL to our house either, don't want our couch stinking of fags when she sits on it. The car smells horrific after we give her a lift to the shops!
MIL is also a raging alcoholic, and spends all her money on booze and fags and not that interested in her GD, just in case anyone started to feel sorry for her!
Plus DP's DF died of smoking related lung cancer which is why he is way ott about anything fag related near his DD.
They are your babies, till so tiny and vulnerable, you make whatever rules you want to that makes you feel they are safe.
Play on their previous lung issues if you need, the smokers will just have to understand their dirty habit is a problem around your babies and suck it up.